Observed 8:50 AM PDT at KSCK

Waterloo, CA weather

Overcast and 57°14°.

Forecasts agree

Now 57°14°

Cloudy

Wind: 7 mph11 km/h; From the west-northwest. 58–9 mph14 km/h through 9 PM
Dew point: 57°14°; A little sticky · down to 49°9° by 8 PM (comfortable)
Humidity: 100%; Air 57°14°, dew point 57°14° · fog or dew likely
UV index: 0Low; Moderate 12–4 PM · peak 4
Air quality: 33Good; Main pollutant: PM2.5 (fine particles)
Pressure: 30.05 inHg1018 hPa; Rising slowly · +0.04 inHg+1.5 hPa in 3 h

Light rain now, through the next 2 hours.

From forecast models

Next 48 hours

Good hours for

High 70°21° today at 5 PM
Below 60°16° tonight after 9 PM
Low 43°6° tomorrow at 7 AM
Above 60°16° tomorrow by 11 AM

This morningUp to 61°16° by 11 AM · Mostly cloudy
This afternoonUp to 70°21° by 5 PM · Partly cloudy
TonightDown to 45°7° by 5 AM · Clear
Tomorrow morningUp to 60°16° by 11 AM · Clear
Tomorrow afternoonUp to 72°22° by 4 PM · Clear
Tomorrow nightDown to 46°8° by 4 AM · Clear
Sunday morningNear 44°7° · Clear

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Fri 9a	Partly sunny	57°14° (likely 56°13° to 60°16°)	57°14°	0%	5 mph8 km/h from NW, gusts 8 mph12 km/h	100%	75%	0
Fri 10a	Cloudy	60°16° (likely 58°14° to 61°16°)	60°16°	0%	6 mph10 km/h from NNW, gusts 10 mph16 km/h	99%	87%	1
Fri 11a	Cloudy	61°16° (likely 61°16° to 63°17°)	61°16°	0%	6 mph10 km/h from NNW, gusts 10 mph16 km/h	96%	92%	2
Fri 12p	Cloudy	63°17° (likely 63°17° to 64°18°)	63°17°	0%	7 mph11 km/h from NW, gusts 12 mph19 km/h	90%	73%	3
Fri 1p	Partly sunny	65°18° (likely 65°18° to 66°19°)	65°18°	0%	8 mph13 km/h from NW, gusts 13 mph21 km/h	84%	52%	4
Fri 2p	Mostly sunny	68°20° (likely 67°19° to 68°20°)	68°20°	0%	9 mph14 km/h from NW, gusts 15 mph24 km/h	75%	37%	3
Fri 3p	Sunny	69°21° (likely 68°20° to 69°21°)	69°21°	0%	9 mph14 km/h from NW, gusts 17 mph27 km/h	63%	13%	3
Fri 4p	Sunny	69°21° (likely 68°20° to 70°21°)	69°21°	0%	9 mph14 km/h from NW, gusts 18 mph29 km/h	55%	6%	1
Fri 5p	Sunny	70°21° (likely 68°20° to 70°21°)	70°21°	0%	8 mph13 km/h from NW, gusts 19 mph30 km/h	54%	4%	2
Fri 6p	Clear	67°19° (likely 64°18° to 67°19°)	67°19°	0%	7 mph11 km/h from NW, gusts 16 mph26 km/h	59%	0%	0
Fri 7p	Clear	64°18° (likely 60°16° to 64°18°)	64°18°	0%	6 mph10 km/h from NW, gusts 11 mph18 km/h	63%	0%	0
Fri 8p	Clear	62°17° (likely 57°14° to 62°17°)	62°17°	0%	5 mph8 km/h from NW, gusts 12 mph19 km/h	63%	0%	0
Fri 9p	Clear	58°14° (likely 55°13° to 59°15°)	58°14°	0%	5 mph8 km/h from WNW, gusts 13 mph22 km/h	67%	0%	0
Fri 10p	Clear	56°13° (likely 53°12° to 57°14°)	56°13°	0%	7 mph11 km/h from WNW, gusts 12 mph19 km/h	70%	0%	0
Fri 11p	Clear	54°12° (likely 51°11° to 56°13°)	54°12°	0%	9 mph14 km/h from WNW, gusts 13 mph20 km/h	70%	0%	0
Sat 12a	Clear	52°11° (likely 50°10° to 55°13°)	52°11°	0%	8 mph13 km/h from NW, gusts 12 mph20 km/h	75%	0%	0
Sat 1a	Clear	50°10° (likely 48°9° to 53°12°)	48°9°	0%	6 mph10 km/h from NW, gusts 10 mph16 km/h	75%	0%	0
Sat 2a	Clear	49°9° (likely 47°8° to 52°11°)	48°9°	0%	3 mph5 km/h from NW, gusts 7 mph12 km/h	79%	0%	0
Sat 3a	Clear	48°9° (likely 46°8° to 51°11°)	48°9°	0%	2 mph3 km/h from W, gusts 6 mph9 km/h	82%	0%	0
Sat 4a	Clear	46°8° (likely 44°7° to 49°9°)	46°8°	0%	2 mph3 km/h from NW, gusts 2 mph4 km/h	82%	0%	0
Sat 5a	Clear	45°7° (likely 43°6° to 49°9°)	45°7°	0%	2 mph3 km/h from ENE, gusts 4 mph6 km/h	84%	0%	0
Sat 6a	Clear	44°7° (likely 41°5° to 47°8°)	44°7°	0%	2 mph3 km/h from ENE, gusts 3 mph5 km/h	90%	0%	0
Sat 7a	Sunny	43°6° (likely 40°4° to 47°8°)	43°6°	0%	2 mph3 km/h from ENE, gusts 3 mph4 km/h	92%	0%	0
Sat 8a	Sunny	44°7° (likely 40°4° to 48°9°)	44°7°	0%	2 mph3 km/h from SE, gusts 4 mph6 km/h	92%	0%	0
Sat 9a	Sunny	49°9° (likely 45°7° to 52°11°)	49°9°	0%	2 mph3 km/h from SE, gusts 7 mph12 km/h	81%	1%	1
Sat 10a	Sunny	56°13° (likely 51°11° to 57°14°)	56°13°	0%	2 mph3 km/h from SE, gusts 9 mph15 km/h	67%	0%	2
Sat 11a	Sunny	60°16° (likely 57°14° to 61°16°)	60°16°	0%	2 mph3 km/h from SSW, gusts 9 mph14 km/h	58%	0%	3
Sat 12p	Sunny	63°17° (likely 61°16° to 64°18°)	63°17°	0%	2 mph3 km/h from SSW, gusts 8 mph13 km/h	54%	0%	4
Sat 1p	Sunny	67°19° (likely 64°18° to 67°19°)	67°19°	0%	2 mph3 km/h from SSW, gusts 7 mph11 km/h	50%	0%	5
Sat 2p	Sunny	70°21° (likely 67°19° to 70°21°)	70°21°	0%	2 mph3 km/h from SW, gusts 6 mph9 km/h	44%	0%	5
Sat 3p	Sunny	71°22° (likely 68°20° to 71°22°)	71°22°	0%	2 mph3 km/h from SW, gusts 5 mph8 km/h	43%	0%	4
Sat 4p	Sunny	72°22° (likely 68°20° to 72°22°)	72°22°	0%	2 mph3 km/h from SW, gusts 4 mph6 km/h	43%	0%	3
Sat 5p	Sunny	71°22° (likely 68°20° to 71°22°)	71°22°	0%	1 mph2 km/h from W, gusts 4 mph7 km/h	44%	0%	2
Sat 6p	Clear	68°20° (likely 64°18° to 68°20°)	68°20°	0%	1 mph2 km/h from W, gusts 5 mph8 km/h	57%	0%	0
Sat 7p	Clear	64°18° (likely 60°16° to 64°18°)	64°18°	0%	1 mph2 km/h from W, gusts 5 mph8 km/h	66%	0%	0
Sat 8p	Clear	60°16° (likely 57°14° to 60°16°)	60°16°	0%	0 mph0 km/h, gusts 6 mph9 km/h	73%	0%	0
Sat 9p	Clear	57°14° (likely 54°12° to 58°14°)	57°14°	0%	0 mph0 km/h, gusts 6 mph10 km/h	79%	0%	0
Sat 10p	Clear	54°12° (likely 52°11° to 56°13°)	54°12°	0%	0 mph0 km/h, gusts 6 mph10 km/h	83%	1%	0
Sat 11p	Clear	53°12° (likely 50°10° to 54°12°)	53°12°	0%	1 mph2 km/h from ESE, gusts 6 mph10 km/h	86%	4%	0
Sun 12a	Clear	51°11° (likely 48°9° to 53°12°)	51°11°	0%	1 mph2 km/h from ESE, gusts 5 mph9 km/h	89%	0%	0
Sun 1a	Clear	49°9° (likely 47°8° to 52°11°)	49°9°	0%	1 mph2 km/h from ESE, gusts 6 mph10 km/h	91%	0%	0
Sun 2a	Clear	48°9° (likely 47°8° to 51°11°)	48°9°	0%	2 mph3 km/h from ESE, gusts 7 mph11 km/h	92%	0%	0
Sun 3a	Clear	47°8° (likely 46°8° to 51°11°)	47°8°	0%	2 mph3 km/h from ESE, gusts 6 mph10 km/h	92%	5%	0
Sun 4a	Clear	46°8° (likely 45°7° to 52°11°)	46°8°	0%	2 mph3 km/h from ESE, gusts 5 mph9 km/h	92%	30%	0
Sun 5a	Clear	46°8° (likely 44°7° to 52°11°)	46°8°	0%	2 mph3 km/h from ESE, gusts 5 mph8 km/h	92%	26%	0
Sun 6a	Clear	44°7° (likely 41°5° to 55°13°)	44°7°	0%	2 mph3 km/h from ESE, gusts 3 mph4 km/h	96%	2%	0
Sun 7a	Mostly sunny	43°6° (likely 40°4° to 54°12°)	43°6°	0%	2 mph3 km/h from ESE, gusts 2 mph4 km/h	99%	8%	0
Sun 8a	Sunny	44°7° (likely 40°4° to 56°13°)	44°7°	0%	1 mph2 km/h from E, gusts 2 mph3 km/h	98%	14%	0

Days ahead

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

Today, Oct 23. Drizzle. High 70°21°, low 43°6°. Typical 77°25° / 49°9°. Rain 0.04 in1 mm, 0% chance. Forecasts agree.
1. Morning
  6 AM–noon
  Cloudy, 61°16°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Clear, 62°17°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 45°7°
  Dry
Official NWS forecast
Today: Mostly sunny, with a high near 70. Northwest wind 5 to 9 mph, with gusts as high as 20 mph.
Tonight: Clear. Low around 43, with temperatures rising to around 45 overnight. Northwest wind 2 to 9 mph, with gusts as high as 18 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
68°20°–70°21°
Low, likely
43°6°–54°12°
Typical high / low
77°25° / 49°9°
Wind
14 mph23 km/h, gusts 22 mph36 km/h
UV peak
5
Tomorrow, Oct 24. Sunny. High 72°22°, low 43°6°. Typical 77°25° / 48°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Clear, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 46°8°
  Dry
Official NWS forecast
Day: Sunny, with a high near 72. South southwest wind around 2 mph.
Night: Clear, with a low around 43. East southeast wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
68°20°–72°22°
Low, likely
40°4°–47°8°
Typical high / low
77°25° / 48°9°
Wind
8 mph13 km/h, gusts 17 mph27 km/h
UV peak
5
Sunday, Oct 25. Mostly sunny. High 75°24°, low 47°8°. Typical 76°24° / 48°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 74°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 63°17°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 51°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 75. South southwest wind around 2 mph.
Night: Mostly clear, with a low around 47.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
72°22°–76°24°
Low, likely
43°6°–50°10°
Typical high / low
76°24° / 48°9°
Wind
6 mph9 km/h, gusts 12 mph19 km/h
UV peak
4
Monday, Oct 26. Mostly sunny. High 73°23°, low 45°7°. Typical 76°24° / 48°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 71°22°
  Dry
3. Evening
  6 PM–midnight
  Clear, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 48°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 73.
Night: Mostly clear, with a low around 45.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
69°21°–74°23°
Low, likely
44°7°–54°12°
Typical high / low
76°24° / 48°9°
Wind
10 mph17 km/h, gusts 19 mph31 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 70°21°, low 44°7°. Typical 76°24° / 48°9°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 47°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 47°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 70.
Night: Partly cloudy, with a low around 44.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
67°19°–70°21°
Low, likely
43°6°–51°11°
Typical high / low
76°24° / 48°9°
Wind
7 mph10 km/h, gusts 15 mph24 km/h
UV peak
4
Wednesday, Oct 28. Partly sunny. High 70°21°, low 45°7°. Typical 75°24° / 47°8°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 69°21°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 60°15°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 70.
Night: Partly cloudy, with a low around 45.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
66°19°–71°22°
Low, likely
40°4°–50°10°
Typical high / low
75°24° / 47°8°
Wind
6 mph9 km/h, gusts 11 mph18 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 69°21°, low 44°7°. Typical 75°24° / 47°8°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 51°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 51°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 69.
Night: Partly cloudy, with a low around 44.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
61°16°–69°21°
Low, likely
44°7°–53°12°
Typical high / low
75°24° / 47°8°
Wind
7 mph10 km/h, gusts 12 mph19 km/h
Friday, Oct 30. Cloudy. High 69°21°, low 49°9°. Typical 74°23° / 47°8°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 51°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 62°17°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 54°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
64°18°–72°22°
Low, likely
39°4°–55°13°
Typical high / low
74°23° / 47°8°
Wind
5 mph8 km/h, gusts 11 mph18 km/h
UV peak
4
Saturday, Oct 31. Drizzle. High 66°19°, low 51°11°. Typical 74°23° / 46°8°. Rain 0.16 in4.1 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 55°13°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 59°15°
  30% chance · 0.05 in1.4 mm
4. Overnight
  midnight–6 AM
  Drizzle, 55°13°
  30% chance · 0.21 in5.3 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
59°15°–71°22°
Low, likely
48°9°–54°12°
Typical high / low
74°23° / 46°8°
Wind
8 mph14 km/h, gusts 20 mph33 km/h
UV peak
3
Sunday, Nov 1. Showers. High 66°19°, low 54°12°. Typical 73°23° / 46°8°. Rain 0.9 in23 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Drizzle, 56°13°
  30% chance · 0.29 in7.5 mm
2. Afternoon
  noon–6 PM
  Cloudy, 66°19°
  30% chance · 0.16 in4 mm
3. Evening
  6 PM–midnight
  Showers, 62°17°
  30% chance · 0.31 in7.8 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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–69°21°
Low, likely
48°9°–60°16°
Typical high / low
73°23° / 46°8°
Wind
12 mph19 km/h, gusts 28 mph45 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 70°, low 43°.
Tomorrow
Dry, high 72°, low 43°.
Sunday
Dry, high 75°, low 47°, warming up.
Rest of week
Mostly dry, highs 66–73°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (STO) (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

San Joaquin River at Mossdale Bridge

19 mi

Below flood stage

Level: 6.1 ft
Flow: 1,580 cfs

Forecast peak 5.9 ft Sat 10 PM

Reading from Fri 7:45 AM · NWS gauge page

Mokelumne River at Benson's Ferry

21 mi

Below flood stage

Level: 5.8 ft
Flow: 1,860 cfs

Forecast peak 6.3 ft Fri 5 PM

Reading from Fri 7:15 AM · NWS gauge page

Stanislaus River at Ripon

22 mi

Below flood stage

Level: 41.9 ft
Flow: 965 cfs

Forecast peak 42.5 ft Fri 7 PM

Reading from Fri 7:45 AM · NWS gauge page

Mormon Slough at Bellota

9.3 mi

Below flood stage

Level: 2.7 ft
Flow: 6 cfs

Reading from Fri 8 AM · NWS gauge page

For your home

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

Heating this week

About 14% less heating than a typical week.

This week 18Typical 22

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 11
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

Comfortable, non-humid air (dew point 57°F).

Open the windows?

Today, 10:00 AM–8:00 PM

Good stretch to open the windows.

Is this typical?

Stockton Airport · official normals 1991–2020 · records 1893–2026

Oct 23, today vs a typical year

Today’s expected high is 7°4° colder than typical.

Last 7 days vs normal

On average 1°0° warmer than normal (daily mean temperature).

+6°+3°SatOct 17
+5°+3°SunOct 18
−2°−1°MonOct 19
−3°−2°TueOct 20
−1°WedOct 21
—ThuOct 22
—FriOct 23

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

Sun & moon

Sun

Daylight: 10 h 55 min; Losing 2 min 21 s a day; shortest Dec 21, 1 h 23 min less
Golden hour: 5:39–6:32 PM; Morning 7:04–7:57 AM
Blue hour: 6:32–6:42 PM; Morning 6:54–7:04 AM; first light 6:54 AM

Stars tonight? Good

Clear 6:42 PM–6:55 AM; moon 96% lit, sets 5:43 AM.

Moon

Waxing gibbous

92% lit · growing

Today: sets 4:36 AM · rises 4:48 PM
Full moon: Oct 25
New moon: Nov 8

Looking east from Waterloo. The highest point on the skyline is about 11,500 ft, 85 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

Waterloo, CA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Sunday

Rest of week

What changed since yesterday

Radar

Rivers

San Joaquin River at Mossdale Bridge

Mokelumne River at Benson's Ferry

Stanislaus River at Ripon

Mormon Slough at Bellota

For your home

Heating this week

Heat-pump hours, next 7 days

Comfort

Open the windows?

Is this typical?

Oct 23, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Good

Moon