Observed 4:15 PM EDT at KTHV

Jefferson, PA weather

Sunny and 63°17°, jacket by 7 PM.

Forecasts agree

Now 63°17°

Sunny

Wind: Calm; Light through 4 AM
Dew point: 30°−1°; Dry · up to 39°4° by 9 PM (comfortable)
UV tomorrow: 4Moderate; Moderate 11 AM–5 PM · peak 4
Air quality: 58Moderate; Main pollutant: PM2.5 (fine particles)
Pressure: 30.5 inHg1033 hPa; Falling slowly · −0.02 inHg−0.6 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

About the same as this time yesterday (61°16° then, 61°16° now)

Good hours for

Below 50°10° tonight after 8 PM
Low 36°2° tomorrow at 7 AM
Above 50°10° tomorrow by 10 AM

This afternoonNear 61°16° · Clear
TonightDown to 37°3° by 5 AM · Clear
Tomorrow morningUp to 55°13° by 11 AM · Clear
Tomorrow afternoonUp to 64°18° by 5 PM · Clear
Tomorrow nightDown to 41°5° by 3 AM · Clear
Monday morningUp to 57°14° by 11 AM · Clear
Monday afternoonUp to 68°20° by 3 PM · Clear

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 4p	Sunny	62°17° (likely 59°15° to 62°17°)	62°17°	0%	2 mph3 km/h from SE, gusts 6 mph10 km/h	36%	1%	1
Sat 5p	Sunny	60°16° (likely 57°14° to 60°16°)	60°16°	0%	2 mph3 km/h from SE, gusts 6 mph9 km/h	39%	0%	0
Sat 6p	Clear	57°14° (likely 52°11° to 57°14°)	57°14°	0%	2 mph3 km/h from SE, gusts 6 mph9 km/h	45%	0%	0
Sat 7p	Clear	53°12° (likely 48°9° to 53°12°)	53°12°	0%	1 mph2 km/h from SE, gusts 6 mph10 km/h	54%	0%	0
Sat 8p	Clear	46°8° (likely 46°8° to 49°9°)	46°8°	0%	1 mph2 km/h from SE, gusts 9 mph14 km/h	73%	0%	0
Sat 9p	Clear	43°6° (likely 43°6° to 48°9°)	43°6°	0%	1 mph2 km/h from S, gusts 8 mph13 km/h	86%	0%	0
Sat 10p	Clear	42°6° (likely 42°6° to 47°8°)	42°6°	0%	1 mph2 km/h from S, gusts 7 mph12 km/h	86%	0%	0
Sat 11p	Clear	41°5° (likely 41°5° to 46°8°)	41°5°	0%	0 mph0 km/h, gusts 7 mph11 km/h	86%	0%	0
Sun 12a	Clear	40°4° (likely 40°4° to 46°8°)	40°4°	0%	0 mph0 km/h, gusts 6 mph10 km/h	89%	0%	0
Sun 1a	Clear	39°4° (likely 39°4° to 45°7°)	39°4°	0%	0 mph0 km/h, gusts 6 mph10 km/h	89%	0%	0
Sun 2a	Clear	39°4° (likely 39°4° to 45°7°)	39°4°	0%	0 mph0 km/h, gusts 6 mph10 km/h	92%	0%	0
Sun 3a	Clear	38°3° (likely 38°3° to 45°7°)	38°3°	0%	0 mph0 km/h, gusts 6 mph9 km/h	96%	0%	0
Sun 4a	Clear	38°3° (likely 38°3° to 44°7°)	38°3°	0%	0 mph0 km/h, gusts 4 mph7 km/h	96%	0%	0
Sun 5a	Clear	37°3° (likely 37°3° to 43°6°)	37°3°	0%	0 mph0 km/h, gusts 4 mph6 km/h	96%	0%	0
Sun 6a	Clear	37°3° (likely 37°3° to 43°6°)	37°3°	0%	0 mph0 km/h, gusts 3 mph6 km/h	96%	0%	0
Sun 7a	Sunny	36°2° (likely 34°1° to 42°6°)	36°2°	0%	0 mph0 km/h, gusts 3 mph5 km/h	96%	0%	0
Sun 8a	Sunny	37°3° (likely 33°1° to 42°6°)	37°3°	0%	0 mph0 km/h, gusts 4 mph6 km/h	96%	0%	0
Sun 9a	Sunny	42°6° (likely 40°4° to 47°8°)	42°6°	0%	0 mph0 km/h, gusts 4 mph7 km/h	89%	0%	1
Sun 10a	Sunny	50°10° (likely 50°10° to 53°12°)	50°10°	0%	0 mph0 km/h, gusts 4 mph7 km/h	71%	2%	2
Sun 11a	Sunny	55°13° (likely 55°13° to 57°14°)	55°13°	0%	0 mph0 km/h, gusts 4 mph6 km/h	61%	2%	3
Sun 12p	Sunny	58°14° (likely 58°14° to 59°15°)	58°14°	0%	1 mph2 km/h from SW, gusts 6 mph9 km/h	55%	2%	4
Sun 1p	Sunny	60°16° (likely 60°16° to 61°16°)	60°16°	0%	1 mph2 km/h from SW, gusts 6 mph10 km/h	51%	4%	4
Sun 2p	Sunny	62°17° (likely 61°16° to 62°17°)	62°17°	0%	2 mph3 km/h from SW, gusts 6 mph10 km/h	46%	4%	4
Sun 3p	Sunny	63°17° (likely 62°17° to 63°17°)	63°17°	0%	1 mph2 km/h from SW, gusts 7 mph11 km/h	48%	3%	4
Sun 4p	Sunny	63°17° (likely 62°17° to 63°17°)	63°17°	0%	2 mph3 km/h from SW, gusts 8 mph12 km/h	48%	4%	3
Sun 5p	Sunny	64°18° (likely 60°16° to 64°18°)	64°18°	0%	2 mph3 km/h from SW, gusts 7 mph11 km/h	46%	1%	1
Sun 6p	Clear	60°16° (likely 55°13° to 60°16°)	60°16°	0%	1 mph2 km/h from S, gusts 6 mph10 km/h	53%	0%	0
Sun 7p	Clear	56°13° (likely 52°11° to 56°13°)	56°13°	0%	0 mph0 km/h, gusts 5 mph7 km/h	62%	1%	0
Sun 8p	Clear	52°11° (likely 50°10° to 52°11°)	52°11°	0%	0 mph0 km/h, gusts 5 mph8 km/h	77%	0%	0
Sun 9p	Clear	46°8° (likely 46°8° to 50°10°)	46°8°	0%	0 mph0 km/h, gusts 5 mph9 km/h	93%	0%	0
Sun 10p	Clear	44°7° (likely 44°7° to 48°9°)	44°7°	0%	0 mph0 km/h, gusts 6 mph9 km/h	100%	0%	0
Sun 11p	Clear	43°6° (likely 43°6° to 48°9°)	43°6°	0%	1 mph2 km/h from S, gusts 6 mph10 km/h	100%	0%	0
Mon 12a	Mostly clear	43°6° (likely 43°6° to 48°9°)	43°6°	0%	0 mph0 km/h, gusts 7 mph12 km/h	100%	10%	0
Mon 1a	Clear	42°6° (likely 42°6° to 47°8°)	42°6°	0%	1 mph2 km/h from SW, gusts 7 mph11 km/h	100%	38%	0
Mon 2a	Clear	42°6° (likely 42°6° to 47°8°)	42°6°	0%	1 mph2 km/h from SW, gusts 7 mph12 km/h	100%	1%	0
Mon 3a	Clear	41°5° (likely 41°5° to 46°8°)	41°5°	0%	1 mph2 km/h from SW, gusts 8 mph12 km/h	100%	0%	0
Mon 4a	Clear	41°5° (likely 41°5° to 46°8°)	41°5°	0%	1 mph2 km/h from W, gusts 9 mph14 km/h	100%	0%	0
Mon 5a	Clear	41°5° (likely 41°5° to 45°7°)	41°5°	0%	1 mph2 km/h from W, gusts 8 mph13 km/h	100%	7%	0
Mon 6a	Clear	40°4° (likely 40°4° to 44°7°)	40°4°	0%	1 mph2 km/h from W, gusts 7 mph12 km/h	100%	4%	0
Mon 7a	Sunny	40°4° (likely 39°4° to 44°7°)	40°4°	0%	1 mph2 km/h from W, gusts 8 mph13 km/h	100%	6%	0
Mon 8a	Sunny	41°5° (likely 39°4° to 44°7°)	41°5°	0%	1 mph2 km/h from W, gusts 7 mph12 km/h	100%	13%	0
Mon 9a	Sunny	46°8° (likely 43°6° to 49°9°)	46°8°	0%	2 mph3 km/h from W, gusts 7 mph12 km/h	96%	12%	1
Mon 10a	Sunny	52°11° (likely 51°11° to 54°12°)	52°11°	0%	3 mph5 km/h from W, gusts 9 mph14 km/h	83%	1%	2
Mon 11a	Sunny	57°14° (likely 57°14° to 59°15°)	57°14°	0%	3 mph5 km/h from W, gusts 9 mph15 km/h	72%	0%	3
Mon 12p	Sunny	61°16° (likely 61°16° to 63°17°)	61°16°	0%	5 mph8 km/h from NW, gusts 11 mph17 km/h	62%	0%	4
Mon 1p	Sunny	64°18° (likely 63°17° to 65°18°)	64°18°	0%	6 mph10 km/h from NW, gusts 11 mph18 km/h	56%	5%	4
Mon 2p	Sunny	67°19° (likely 65°18° to 67°19°)	67°19°	0%	6 mph10 km/h from NW, gusts 12 mph19 km/h	50%	1%	4
Mon 3p	Sunny	68°20° (likely 65°18° to 68°20°)	68°20°	0%	6 mph10 km/h from NW, gusts 12 mph20 km/h	49%	2%	4

Days ahead

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

Today, Oct 24. Sunny. High 62°17°, low 36°2°. Typical 62°17° / 43°6°. Dry. Forecasts agree.
1. Afternoon
  noon–6 PM
  Sunny, 62°17°
  Dry
2. Evening
  6 PM–midnight
  Clear, 46°8°
  Dry
3. Overnight
  midnight–6 AM
  Clear, 37°3°
  Dry
Official NWS forecast
Today: Sunny, with a high near 62. Southeast wind around 2 mph.
Tonight: Patchy frost after 5am. Clear, with a low around 36. Southeast wind around 2 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
59°15°–62°17°
Low, likely
32°0°–38°3°
Typical high / low
62°17° / 43°6°
Wind
8 mph12 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 64°18°, low 40°4°. Typical 62°17° / 42°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 37°3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 41°5°
  Dry
Official NWS forecast
Day: Patchy frost before 9am. Sunny, with a high near 64. Southwest wind around 2 mph.
Night: Mostly clear, with a low around 40. Southwest wind around 1 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
62°17°–64°18°
Low, likely
33°1°–42°6°
Typical high / low
62°17° / 42°6°
Wind
7 mph12 km/h
UV peak
4
Monday, Oct 26. Mostly sunny. High 69°21°, low 45°7°. Typical 62°17° / 42°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 41°5°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 49°9°
  Dry
Official NWS forecast
Day: Sunny, with a high near 69. West wind 1 to 6 mph.
Night: Mostly clear, with a low around 45.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
66°19°–69°21°
Low, likely
39°4°–45°7°
Typical high / low
62°17° / 42°6°
Wind
9 mph14 km/h, gusts 16 mph26 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 65°18°, low 40°4°. Typical 61°16° / 42°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Clear, 51°10°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 43°6°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 65.
Night: Partly cloudy, with a low around 40.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
62°17°–65°18°
Low, likely
40°4°–49°9°
Typical high / low
61°16° / 42°6°
Wind
10 mph16 km/h, gusts 23 mph37 km/h
UV peak
4
Wednesday, Oct 28. Partly sunny. High 63°17°, low 45°7°. Typical 61°16° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Cloudy, 43°6°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 60°16°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 47°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 63.
Night: Mostly cloudy, with a low around 45.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
59°15°–63°17°
Low, likely
39°4°–45°7°
Typical high / low
61°16° / 41°5°
Wind
8 mph13 km/h, gusts 18 mph28 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 69°21°, low 48°9°. Typical 61°16° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 49°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 69.
Night: Mostly clear, with a low around 48.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–69°21°
Low, likely
43°6°–48°9°
Typical high / low
61°16° / 41°5°
Wind
9 mph14 km/h, gusts 27 mph43 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 73°23°, low 49°9°. Typical 60°16° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 49°10°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Clear, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 52°11°
  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 49.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
71°22°–73°23°
Low, likely
45°7°–52°11°
Typical high / low
60°16° / 41°5°
Wind
9 mph14 km/h, gusts 27 mph44 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 70°21°, low 50°10°. Typical 60°16° / 40°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 71°22°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  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
65°18°–74°23°
Low, likely
49°9°–53°12°
Typical high / low
60°16° / 40°4°
Wind
7 mph12 km/h, gusts 28 mph44 km/h
UV peak
4
Sunday, Nov 1. Cloudy. High 68°20°, low 52°11°. Typical 60°16° / 40°4°. Rain 0.01 in0.3 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 55°13°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 68°20°
  30% chance
3. Evening
  6 PM–midnight
  Drizzle, 62°17°
  30% chance · 0.01 in0.3 mm
4. Overnight
  midnight–6 AM
  Showers, 61°16°
  30% chance · 0.11 in2.8 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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
62°17°–72°22°
Low, likely
50°10°–53°12°
Typical high / low
60°16° / 40°4°
Wind
12 mph19 km/h, gusts 26 mph41 km/h
UV peak
2
Monday, Nov 2. Showers. High 70°21°, low 59°15°. Typical 59°15° / 40°4°. Rain 0.58 in15 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 62°17°
  30% chance · 0.05 in1.2 mm
2. Afternoon
  noon–6 PM
  Drizzle, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 64°18°
  30% chance · 0.53 in14 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
63°17°–74°23°
Low, likely
56°13°–65°18°
Typical high / low
59°15° / 40°4°
Wind
17 mph27 km/h, gusts 37 mph60 km/h

10 days15 days30 days

The outlook

Today
Dry, high 62°, low 36°.
Tomorrow
Dry, high 64°, low 40°.
Monday
Dry, high 69°, low 45°, warming up.
Rest of week
Mostly dry, highs 63–73°.

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

Codorus Creek at Spring Grove

4.6 mi

Level: 0.8 ft
Flow: 14 cfs

Reading from Sat 3 PM · NWS gauge page

Central PA Dams Indian Rock Dam on Codorus Creek

9.0 mi

Below flood stage

Level: 373 ft

Reading from Sat 3 PM · NWS gauge page

Gunpowder Falls at Hoffmanville

9.1 mi

Below flood stage

Level: 1.1 ft
Flow: 7 cfs

Reading from Sat 2:15 PM · NWS gauge page

Codorus Creek near York

10 mi

Level: 2.1 ft
Flow: 74 cfs

Reading from Sat 2:30 PM · NWS gauge page

For your home

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

Heating this week

About 66% less heating than a typical week.

This week 32Typical 95

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 27
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at. About 20 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 30°F).

Open the windows?

Sun, 1:00 PM–6:00 PM

Good stretch to open the windows.

Is this typical?

Millers 4 NE · official normals 1991–2020 · records 1988–2026

Oct 24, today vs a typical year

Today’s expected high is about typical for the date.

Last 7 days vs normal

On average 2°1° colder than normal (daily mean temperature).

−7°−4°SunOct 18
−4°−2°MonOct 19
+4°+2°TueOct 20
±0°WedOct 21
±0°ThuOct 22
−1°FriOct 23
—SatOct 24

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

Sun & moon

Sun

Daylight: 10 h 48 min; Losing 2 min 25 s a day; shortest Dec 21, 1 h 27 min less
Golden hour: 5:37–6:32 PM; Morning 7:10–8:04 AM
Blue hour: 6:32–6:42 PM; Morning 6:59–7:10 AM; first light 6:59 AM

Stars tonight? Fair

Clear 6:42 PM–7 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

98% lit · growing

Today: sets 5:39 AM · rises 5:11 PM
Full moon: Oct 26
New moon: Nov 9

Looking southeast from Jefferson. The highest point on the skyline is about 4,400 ft, 33 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.