Dense Fog Advisory
Ends in 3 h 47 min
When
Until 9 AM CDT this morning.
Where
Ozaukee and Washington Counties.
Issued for this forecast zone · National Weather Service Milwaukee/Sullivan WI
What, impacts and precautionsHide details
What
Visibility less than one mile in dense fog.
Impacts
Low visibility could make driving conditions hazardous.
Precautionary actions
If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Areas: Washington; Ozaukee
See it on weather.gov (opens in a new tab)

Observed 4:35 AM CDT at KETB

Hartford, WI weather

Foggy and 41°5°, 14°8° warmer than a typical Oct 24.

Forecasts agree

Now 41°5°

Fog

Wind: Calm; Up to 10 mph16 km/h through 5 PM
Visibility (notable): 0.2 mi0.3 km; Dense fog
Dew point: 41°5°; Comfortable
Humidity: 100%; Air 41°5°, dew point 41°5° · fog or dew likely
UV index: 0Low; Moderate 1–2 PM · peak 3
Air quality: 64Moderate; Main pollutant: PM2.5 (fine particles)
Pressure: 30.36 inHg1028 hPa; Steady over the last 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

5°3° cooler than this time yesterday (46°8° then, 41°5° now)

Good hours for

Above 60°16° today by 11 AM
High 69°21° today at 3 PM
Below 60°16° tonight after 8 PM

This morningUp to 63°17° by 11 AM · Mostly cloudy
This afternoonNear 67°19° · Mostly cloudy
TonightDown to 53°12° by 4 AM · Mostly cloudy
Tomorrow morningUp to 64°18° by 11 AM · Mostly cloudy
Tomorrow afternoonUp to 72°22° by 3 PM · Mostly cloudy
Tomorrow nightDown to 51°11° by 4 AM · Mostly cloudy

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 5a	Clear	43°6° (likely 43°6° to 51°11°)	43°6°	0%	0 mph0 km/h, gusts 10 mph16 km/h	100%	33%	0
Sat 6a	Mostly cloudy	44°7° (likely 44°7° to 51°11°)	42°6°	0%	5 mph8 km/h from S, gusts 10 mph16 km/h	100%	49%	0
Sat 7a	Cloudy	46°8° (likely 46°8° to 51°11°)	45°7°	5%	5 mph8 km/h from S, gusts 11 mph18 km/h	93%	75%	0
Sat 8a	Cloudy	50°10° (likely 49°9° to 52°11°)	48°9°	5%	5 mph8 km/h from S, gusts 11 mph17 km/h	83%	81%	0
Sat 9a	Cloudy	54°12° (likely 54°12° to 55°13°)	54°12°	5%	5 mph8 km/h from S, gusts 12 mph19 km/h	77%	80%	0
Sat 10a	Cloudy	59°15° (likely 58°14° to 59°15°)	59°15°	0%	5 mph8 km/h from S, gusts 17 mph28 km/h	64%	80%	1
Sat 11a	Cloudy	63°17° (likely 61°16° to 63°17°)	63°17°	0%	5 mph8 km/h from S, gusts 17 mph28 km/h	58%	81%	2
Sat 12p	Cloudy	66°19° (likely 64°18° to 66°19°)	66°19°	0%	10 mph16 km/h from S, gusts 17 mph28 km/h	52%	80%	2
Sat 1p	Cloudy	68°20° (likely 66°19° to 68°20°)	68°20°	0%	10 mph16 km/h from S, gusts 16 mph26 km/h	49%	76%	3
Sat 2p	Cloudy	68°20° (likely 67°19° to 69°21°)	68°20°	0%	10 mph16 km/h from S, gusts 17 mph28 km/h	49%	75%	2
Sat 3p	Cloudy	69°21° (likely 67°19° to 69°21°)	69°21°	0%	10 mph16 km/h from S, gusts 16 mph26 km/h	47%	76%	2
Sat 4p	Cloudy	68°20° (likely 67°19° to 69°21°)	68°20°	5%	10 mph16 km/h from S, gusts 16 mph26 km/h	49%	79%	1
Sat 5p	Cloudy	67°19° (likely 65°18° to 67°19°)	67°19°	5%	10 mph16 km/h from S, gusts 16 mph26 km/h	50%	75%	0
Sat 6p	Cloudy	65°18° (likely 62°17° to 65°18°)	65°18°	5%	5 mph8 km/h from S, gusts 12 mph19 km/h	54%	77%	0
Sat 7p	Cloudy	61°16° (likely 60°16° to 61°16°)	61°16°	5%	5 mph8 km/h from S, gusts 12 mph20 km/h	62%	79%	0
Sat 8p	Mostly cloudy	59°15° (likely 58°14° to 60°16°)	59°15°	5%	5 mph8 km/h from S, gusts 13 mph21 km/h	67%	51%	0
Sat 9p	Mostly cloudy	59°15° (likely 56°13° to 59°15°)	59°15°	5%	5 mph8 km/h from S, gusts 14 mph22 km/h	67%	47%	0
Sat 10p	Cloudy	58°14° (likely 57°14° to 59°15°)	58°14°	5%	5 mph8 km/h from S, gusts 13 mph21 km/h	69%	90%	0
Sat 11p	Cloudy	57°14° (likely 57°14° to 58°14°)	57°14°	5%	5 mph8 km/h from S, gusts 13 mph20 km/h	69%	88%	0
Sun 12a	Cloudy	56°13° (likely 56°13° to 58°14°)	56°13°	5%	5 mph8 km/h from S, gusts 13 mph21 km/h	72%	96%	0
Sun 1a	Cloudy	55°13° (likely 55°13° to 57°14°)	55°13°	5%	5 mph8 km/h from S, gusts 13 mph21 km/h	74%	89%	0
Sun 2a	Cloudy	55°13° (likely 54°12° to 56°13°)	55°13°	5%	5 mph8 km/h from S, gusts 12 mph20 km/h	72%	84%	0
Sun 3a	Cloudy	54°12° (likely 54°12° to 56°13°)	54°12°	5%	5 mph8 km/h from S, gusts 12 mph20 km/h	74%	79%	0
Sun 4a	Cloudy	53°12° (likely 53°12° to 55°13°)	53°12°	5%	5 mph8 km/h from S, gusts 12 mph19 km/h	74%	80%	0
Sun 5a	Partly cloudy	53°12° (likely 53°12° to 55°13°)	53°12°	5%	5 mph8 km/h from SW, gusts 11 mph18 km/h	74%	77%	0
Sun 6a	Cloudy	53°12° (likely 51°11° to 55°13°)	53°12°	5%	5 mph8 km/h from SW, gusts 10 mph17 km/h	74%	88%	0
Sun 7a	Cloudy	51°11° (likely 51°11° to 55°13°)	51°11°	0%	5 mph8 km/h from SW, gusts 10 mph17 km/h	80%	80%	0
Sun 8a	Cloudy	53°12° (likely 53°12° to 55°13°)	53°12°	0%	5 mph8 km/h from SW, gusts 10 mph16 km/h	77%	78%	0
Sun 9a	Partly sunny	56°13° (likely 56°13° to 57°14°)	56°13°	0%	5 mph8 km/h from SW, gusts 11 mph17 km/h	74%	72%	1
Sun 10a	Partly sunny	60°16° (likely 59°15° to 60°16°)	60°16°	0%	5 mph8 km/h from SW, gusts 13 mph21 km/h	67%	68%	1
Sun 11a	Partly sunny	64°18° (likely 61°16° to 64°18°)	64°18°	0%	5 mph8 km/h from SW, gusts 12 mph19 km/h	58%	68%	2
Sun 12p	Mostly sunny	68°20° (likely 64°18° to 68°20°)	68°20°	0%	5 mph8 km/h from SW, gusts 12 mph19 km/h	52%	43%	3
Sun 1p	Partly sunny	70°21° (likely 67°19° to 70°21°)	70°21°	0%	5 mph8 km/h from SW, gusts 10 mph16 km/h	49%	36%	3
Sun 2p	Partly sunny	70°21° (likely 69°21° to 71°22°)	70°21°	0%	5 mph8 km/h from SW, gusts 9 mph15 km/h	51%	57%	3
Sun 3p	Cloudy	72°22° (likely 69°21° to 72°22°)	72°22°	0%	5 mph8 km/h from SW, gusts 9 mph14 km/h	48%	76%	2
Sun 4p	Cloudy	71°22° (likely 68°20° to 72°22°)	71°22°	0%	5 mph8 km/h from SW, gusts 8 mph13 km/h	51%	75%	2
Sun 5p	Cloudy	70°21° (likely 63°17° to 70°21°)	70°21°	0%	0 mph0 km/h, gusts 9 mph15 km/h	53%	78%	1
Sun 6p	Cloudy	66°19° (likely 60°16° to 66°19°)	66°19°	0%	0 mph0 km/h, gusts 8 mph12 km/h	61%	80%	0
Sun 7p	Cloudy	62°17° (likely 57°14° to 62°17°)	62°17°	0%	0 mph0 km/h, gusts 8 mph12 km/h	70%	80%	0
Sun 8p	Cloudy	60°16° (likely 56°13° to 60°16°)	60°16°	0%	0 mph0 km/h, gusts 9 mph14 km/h	72%	74%	0
Sun 9p	Cloudy	58°14° (likely 56°13° to 58°14°)	58°14°	0%	0 mph0 km/h, gusts 10 mph16 km/h	75%	67%	0
Sun 10p	Cloudy	57°14° (likely 55°13° to 57°14°)	57°14°	0%	0 mph0 km/h, gusts 11 mph18 km/h	77%	62%	0
Sun 11p	Cloudy	55°13° (likely 54°12° to 56°13°)	55°13°	0%	0 mph0 km/h, gusts 12 mph19 km/h	80%	62%	0
Mon 12a	Cloudy	54°12° (likely 53°12° to 55°13°)	54°12°	0%	0 mph0 km/h, gusts 12 mph20 km/h	83%	65%	0
Mon 1a	Mostly cloudy	53°12° (likely 52°11° to 54°12°)	53°12°	0%	0 mph0 km/h, gusts 12 mph20 km/h	83%	69%	0
Mon 2a	Mostly cloudy	52°11° (likely 50°10° to 54°12°)	52°11°	0%	0 mph0 km/h, gusts 13 mph21 km/h	83%	67%	0
Mon 3a	Mostly cloudy	52°11° (likely 51°11° to 52°11°)	52°11°	0%	5 mph8 km/h from NE, gusts 15 mph24 km/h	80%	69%	0
Mon 4a	Mostly cloudy	51°11° (likely 49°9° to 52°11°)	51°11°	0%	5 mph8 km/h from NE, gusts 17 mph28 km/h	80%	70%	0

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 24. Mostly cloudy. High 69°21°, low 43°6°. Typical 55°13° / 34°1°. Dry. Forecasts agree. Best day outdoors this week.
1. Morning
  6 AM–noon
  Cloudy, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 69°21°
  Dry
3. Evening
  6 PM–midnight
  Mostly cloudy, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 53°12°
  Dry
Official NWS forecast
Today: Mostly cloudy, with a high near 69. South wind 5 to 10 mph.
Tonight: Mostly cloudy, with a low around 43. South wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
Best day outdoors this week: the one dry, mild day the forecasts agree on (high 69°21°).
High, likely
68°20°–69°21°
Low, likely
43°6°–51°11°
Typical high / low
55°13° / 34°1°
Wind
11 mph18 km/h, gusts 23 mph36 km/h
UV peak
3
Tomorrow, Oct 25. Cloudy. High 72°22°, low 49°9°. Typical 54°12° / 34°1°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 53°12°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Mostly cloudy, 50°10°
  Dry
Official NWS forecast
Day: Mostly sunny, with a high near 72. Southwest wind 0 to 5 mph.
Night: Mostly cloudy, with a low around 49. West wind 0 to 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
69°21°–72°22°
Low, likely
49°9°–54°12°
Typical high / low
54°12° / 34°1°
Wind
9 mph14 km/h, gusts 18 mph29 km/h
UV peak
3
Monday, Oct 26. Mostly cloudy. High 58°14°, low 44°7°. Typical 54°12° / 34°1°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 57°14°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 49°9°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 49°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly cloudy, with a high near 58. Northeast wind 5 to 10 mph.
Night: Mostly cloudy, with a low around 44. Northeast wind 5 to 10 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
56°13°–58°14°
Low, likely
44°7°–49°9°
Typical high / low
54°12° / 34°1°
Wind
16 mph25 km/h, gusts 24 mph38 km/h
UV peak
3
Tuesday, Oct 27. Cloudy. High 59°15°, low 48°9°. Typical 53°12° / 33°1°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 51°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 54°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly cloudy, with a high near 59. East wind 5 to 10 mph.
Night: Mostly cloudy, with a low around 48.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
59°15°–66°19°
Low, likely
46°8°–50°10°
Typical high / low
53°12° / 33°1°
Wind
15 mph24 km/h, gusts 28 mph44 km/h
UV peak
3
Wednesday, Oct 28. Partly sunny. High 69°21°, low 49°9°. Typical 53°12° / 33°1°. Rain 0.03 in0.8 mm, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 55°13°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 60°15°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 55°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain showers after 1pm. Mostly sunny, with a high near 69. Chance of precipitation is 20%.
Night: A slight chance of rain showers. Partly cloudy, with a low around 49. Chance of precipitation is 20%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
66°19°–70°21°
Low, likely
49°9°–55°13°
Typical high / low
53°12° / 33°1°
Wind
15 mph24 km/h, gusts 28 mph45 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 65°18°, low 44°7°. Typical 52°11° / 32°0°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 55°13°
  Dry
2. Afternoon
  noon–6 PM
  Drizzle, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 57°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 49°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain showers before 7am. Mostly sunny, with a high near 65. Chance of precipitation is 20%.
Night: A slight chance of rain showers after 7pm. Partly cloudy, with a low around 44. Chance of precipitation is 20%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
63°17°–70°21°
Low, likely
44°7°–56°13°
Typical high / low
52°11° / 32°0°
Wind
15 mph24 km/h, gusts 35 mph56 km/h
UV peak
3
Friday, Oct 30. Showers. High 63°17°, low 48°9°. Typical 52°11° / 32°0°. Rain 0.03 in0.8 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 51°10°
  20% chance
2. Afternoon
  noon–6 PM
  Cloudy, 65°19°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 56°14°
  Dry
4. Overnight
  midnight–6 AM
  Showers, 55°13°
  30% chance · 0.12 in3 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain showers. Mostly sunny, with a high near 63. Chance of precipitation is 20%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
61°16°–72°22°
Low, likely
39°4°–56°13°
Typical high / low
52°11° / 32°0°
Wind
12 mph19 km/h, gusts 21 mph33 km/h
UV peak
3
Saturday, Oct 31. Cloudy. High 65°18°, low 55°13°. Typical 52°11° / 32°0°. Rain 0.23 in5.8 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 57°14°
  30% chance · 0.03 in0.9 mm
2. Afternoon
  noon–6 PM
  Drizzle, 65°18°
  30% chance
3. Evening
  6 PM–midnight
  Rain, 60°15°
  40% chance · 0.09 in2.4 mm
4. Overnight
  midnight–6 AM
  Drizzle, 58°14°
  40% chance · 0.05 in1.2 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
61°16°–71°22°
Low, likely
51°11°–59°15°
Typical high / low
52°11° / 32°0°
Wind
15 mph25 km/h, gusts 34 mph55 km/h
Sunday, Nov 1. Drizzle. High 62°17°, low 57°14°. Typical 51°11° / 31°−1°. Rain 0.4 in10 mm, 40% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 59°15°
  40% chance · 0.05 in1.2 mm
2. Afternoon
  noon–6 PM
  Cloudy, 61°16°
  40% chance · 0.2 in5 mm
3. Evening
  6 PM–midnight
  Drizzle, 59°15°
  30% chance · 0.08 in2.1 mm
4. Overnight
  midnight–6 AM
  Drizzle, 52°11°
  30% chance
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
58°14°–65°18°
Low, likely
54°12°–59°15°
Typical high / low
51°11° / 31°−1°
Wind
26 mph42 km/h, gusts 39 mph63 km/h
UV peak
1
Monday, Nov 2. Cloudy. High 59°15°, low 52°11°. Typical 50°10° / 31°−1°. Rain 0.22 in5.6 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 53°12°
  20% chance · 0.01 in0.4 mm
2. Afternoon
  noon–6 PM
  Drizzle, 55°13°
  20% chance · 0.14 in3.6 mm
3. Evening
  6 PM–midnight
  Cloudy, 53°12°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
55°13°–63°17°
Low, likely
46°8°–58°14°
Typical high / low
50°10° / 31°−1°
Wind
13 mph21 km/h, gusts 30 mph49 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 69°, low 43°.
Tomorrow
Dry, high 72°, low 49°, warming up.
Monday
Dry, high 58°, low 44°, cooling off.
Rest of week
Mostly dry, highs 59–69°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (MKX) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Rock River at Lebanon-3 E-Hwy MM bridge

11 mi

Below flood stage

Level: 6.1 ft
Flow: 365 cfs

Reading from Sat 4 AM · NWS gauge page

Rock River at Horicon

16 mi

Below flood stage

Level: 7.0 ft
Flow: 556 cfs

Reading from Sat 4 AM · NWS gauge page

Menomonee River at Menomonee Falls

17 mi

Below flood stage

Level: 3.2 ft
Flow: 14 cfs

Reading from Sat 4 AM · NWS gauge page

Rock River at Watertown

20 mi

Below flood stage

Level: 2.2 ft
Flow: 511 cfs

Reading from Sat 4 AM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 91% less heating than a typical week.

This week 13Typical 153

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 2
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at.

Comfort

Dry air outside (dew point 41°F).

Open the windows?

Today, 11:00 AM–7:00 PM

Good stretch to open the windows.

Is this typical?

HARTFORD WWTP · official normals 1991–2020 · records 1897–2026

Oct 24, today vs a typical year

Today’s expected high is 14°8° warmer than typical.

Last 7 days vs normal

On average 5°3° warmer than normal (daily mean temperature).

−4°−2°SunOct 18
+4°+2°MonOct 19
+5°+3°TueOct 20
+7°+4°WedOct 21
+8°+4°ThuOct 22
+11°+6°FriOct 23
—SatOct 24

Hartford weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 38 min; Losing 2 min 44 s a day; shortest Dec 21, 1 h 39 min less
Golden hour: 5:16–6:14 PM; Morning 7:00–7:58 AM
Blue hour: 6:14–6:25 PM; Morning 6:49–7:00 AM; first light 6:49 AM

Stars tonight? Poor

Clouds most of the night (about 41% cover).

Moon

Waxing gibbous

96% lit · growing

Today: sets 5:30 AM · rises 4:54 PM
Full moon: Oct 25
New moon: Nov 9

Looking west from Hartford. The highest point on the skyline is about 4,200 ft, 52 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

1 active weather alert

Dense Fog Advisory

Hartford, WI weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Rock River at Lebanon-3 E-Hwy MM bridge

Rock River at Horicon

Menomonee River at Menomonee Falls

Rock River at Watertown

For your home

Heating this week

Heat-pump hours, next 7 days

Comfort

Open the windows?

Is this typical?

Oct 24, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Poor

Moon