Observed 1:35 PM EDT at KMDT

Hummelstown, PA weather

Sunny and 59°15°, jacket by 7 PM.

Forecasts agree

Now 59°15°

Sunny

Wind: 3 mph5 km/h; From the south-southeast. Light through 1 AM
Dew point: 34°1°; Dry, static shocks likely
UV index: 4Moderate; Moderate until 4 PM
Air quality: 92Moderate; Main pollutant: PM2.5 (fine particles)
Pressure: 30.54 inHg1034 hPa; Falling · −0.05 inHg−1.6 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

High 63°17° today at 5 PM
Below 50°10° tonight after 9 PM
Low 36°2° tomorrow at 7 AM
Above 50°10° tomorrow by 10 AM

This afternoonUp to 63°17° by 5 PM · Clear
TonightDown to 37°3° by 4 AM · Clear
Tomorrow morningUp to 55°13° by 11 AM · Clear
Tomorrow afternoonUp to 65°18° by 5 PM · Clear
Tomorrow nightDown to 41°5° by 4 AM · Clear
Monday morningUp to 57°14° by 11 AM · 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 1p	Sunny	59°15° (likely 57°14° to 59°15°)	59°15°	0%	0 mph0 km/h, gusts 6 mph10 km/h	42%	0%	4
Sat 2p	Sunny	61°16° (likely 58°14° to 61°16°)	61°16°	0%	1 mph2 km/h from S, gusts 7 mph11 km/h	38%	0%	4
Sat 3p	Sunny	62°17° (likely 59°15° to 62°17°)	62°17°	0%	1 mph2 km/h from S, gusts 4 mph7 km/h	37%	0%	3
Sat 4p	Sunny	62°17° (likely 59°15° to 62°17°)	62°17°	0%	1 mph2 km/h from SE, gusts 4 mph7 km/h	36%	0%	2
Sat 5p	Sunny	63°17° (likely 57°14° to 63°17°)	63°17°	0%	1 mph2 km/h from SE, gusts 4 mph6 km/h	36%	0%	1
Sat 6p	Clear	59°15° (likely 54°12° to 59°15°)	59°15°	0%	1 mph2 km/h from SE, gusts 5 mph8 km/h	42%	0%	0
Sat 7p	Clear	55°13° (likely 50°10° to 55°13°)	55°13°	0%	0 mph0 km/h, gusts 4 mph7 km/h	50%	0%	0
Sat 8p	Clear	51°11° (likely 48°9° to 51°11°)	51°11°	0%	0 mph0 km/h, gusts 3 mph5 km/h	61%	0%	0
Sat 9p	Clear	45°7° (likely 45°7° to 49°9°)	45°7°	0%	0 mph0 km/h, gusts 4 mph6 km/h	82%	0%	0
Sat 10p	Clear	42°6° (likely 42°6° to 47°8°)	42°6°	0%	0 mph0 km/h, gusts 3 mph5 km/h	93%	0%	0
Sat 11p	Clear	41°5° (likely 41°5° to 45°7°)	41°5°	0%	0 mph0 km/h, gusts 3 mph5 km/h	93%	0%	0
Sun 12a	Clear	39°4° (likely 39°4° to 43°6°)	39°4°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	0%	0
Sun 1a	Clear	39°4° (likely 39°4° to 42°6°)	39°4°	0%	0 mph0 km/h, gusts 2 mph4 km/h	100%	0%	0
Sun 2a	Clear	38°3° (likely 38°3° to 41°5°)	38°3°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	0%	0
Sun 3a	Clear	38°3° (likely 38°3° to 40°4°)	38°3°	0%	0 mph0 km/h, gusts 3 mph4 km/h	100%	1%	0
Sun 4a	Clear	37°3° (likely 37°3° to 39°4°)	37°3°	0%	0 mph0 km/h, gusts 3 mph4 km/h	100%	2%	0
Sun 5a	Clear	37°3° (likely 36°2° to 39°4°)	37°3°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	3%	0
Sun 6a	Clear	37°3° (likely 35°2° to 38°3°)	37°3°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	3%	0
Sun 7a	Sunny	36°2° (likely 34°1° to 38°3°)	36°2°	0%	0 mph0 km/h, gusts 2 mph4 km/h	99%	3%	0
Sun 8a	Sunny	37°3° (likely 34°1° to 39°4°)	37°3°	0%	0 mph0 km/h, gusts 2 mph4 km/h	96%	3%	0
Sun 9a	Sunny	42°6° (likely 37°3° to 43°6°)	42°6°	0%	0 mph0 km/h, gusts 2 mph3 km/h	86%	3%	1
Sun 10a	Sunny	50°10° (likely 46°8° to 50°10°)	50°10°	0%	0 mph0 km/h, gusts 2 mph3 km/h	71%	2%	2
Sun 11a	Sunny	55°13° (likely 53°12° to 55°13°)	55°13°	0%	0 mph0 km/h, gusts 4 mph7 km/h	61%	2%	3
Sun 12p	Sunny	58°14° (likely 56°13° to 58°14°)	58°14°	0%	1 mph2 km/h from SW, gusts 6 mph10 km/h	57%	2%	4
Sun 1p	Sunny	61°16° (likely 58°14° to 61°16°)	61°16°	0%	2 mph3 km/h from SW, gusts 7 mph12 km/h	49%	2%	4
Sun 2p	Sunny	63°17° (likely 60°16° to 63°17°)	63°17°	0%	2 mph3 km/h from SW, gusts 7 mph11 km/h	46%	3%	4
Sun 3p	Sunny	64°18° (likely 61°16° to 64°18°)	64°18°	0%	2 mph3 km/h from SW, gusts 8 mph14 km/h	46%	3%	3
Sun 4p	Sunny	64°18° (likely 61°16° to 64°18°)	64°18°	0%	2 mph3 km/h from S, gusts 8 mph13 km/h	46%	2%	2
Sun 5p	Sunny	65°18° (likely 60°16° to 65°18°)	65°18°	0%	1 mph2 km/h from SW, gusts 8 mph13 km/h	45%	1%	1
Sun 6p	Clear	61°16° (likely 56°13° to 61°16°)	61°16°	0%	0 mph0 km/h, gusts 7 mph11 km/h	51%	0%	0
Sun 7p	Clear	57°14° (likely 53°12° to 57°14°)	57°14°	0%	0 mph0 km/h, gusts 5 mph8 km/h	62%	0%	0
Sun 8p	Clear	53°12° (likely 50°10° to 53°12°)	53°12°	0%	0 mph0 km/h, gusts 6 mph9 km/h	74%	0%	0
Sun 9p	Clear	47°8° (likely 47°8° to 50°10°)	47°8°	0%	0 mph0 km/h, gusts 4 mph7 km/h	96%	0%	0
Sun 10p	Clear	45°7° (likely 45°7° to 49°9°)	45°7°	0%	0 mph0 km/h, gusts 3 mph6 km/h	100%	0%	0
Sun 11p	Clear	44°7° (likely 44°7° to 47°8°)	44°7°	0%	0 mph0 km/h, gusts 4 mph7 km/h	100%	2%	0
Mon 12a	Clear	43°6° (likely 43°6° to 46°8°)	43°6°	0%	0 mph0 km/h, gusts 4 mph7 km/h	100%	26%	0
Mon 1a	Mostly clear	43°6° (likely 42°6° to 45°7°)	43°6°	0%	0 mph0 km/h, gusts 3 mph5 km/h	100%	12%	0
Mon 2a	Mostly clear	42°6° (likely 41°5° to 43°6°)	42°6°	0%	0 mph0 km/h, gusts 2 mph4 km/h	100%	20%	0
Mon 3a	Clear	42°6° (likely 40°4° to 43°6°)	42°6°	0%	1 mph2 km/h from W, gusts 2 mph3 km/h	100%	19%	0
Mon 4a	Clear	41°5° (likely 39°4° to 42°6°)	41°5°	0%	1 mph2 km/h from W, gusts 3 mph4 km/h	100%	20%	0
Mon 5a	Clear	41°5° (likely 39°4° to 41°5°)	41°5°	0%	1 mph2 km/h from W, gusts 3 mph5 km/h	100%	18%	0
Mon 6a	Clear	40°4° (likely 38°3° to 41°5°)	40°4°	0%	1 mph2 km/h from W, gusts 3 mph5 km/h	99%	21%	0
Mon 7a	Sunny	40°4° (likely 38°3° to 41°5°)	40°4°	0%	1 mph2 km/h from W, gusts 4 mph6 km/h	99%	24%	0
Mon 8a	Sunny	41°5° (likely 37°3° to 42°6°)	41°5°	0%	1 mph2 km/h from W, gusts 4 mph6 km/h	100%	25%	0
Mon 9a	Mostly cloudy	45°7° (likely 38°3° to 48°9°)	45°7°	0%	2 mph3 km/h from W, gusts 5 mph8 km/h	100%	34%	1
Mon 10a	Sunny	51°11° (likely 43°6° to 53°12°)	50°10°	0%	3 mph5 km/h from W, gusts 7 mph11 km/h	86%	5%	2
Mon 11a	Mostly sunny	57°14° (likely 50°10° to 57°14°)	57°14°	0%	3 mph5 km/h from W, gusts 9 mph14 km/h	72%	8%	3
Mon 12p	Sunny	61°16° (likely 56°13° to 61°16°)	61°16°	0%	5 mph8 km/h from W, gusts 10 mph16 km/h	63%	2%	4

Days ahead

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

Today, Oct 24. Sunny. High 63°17°, low 36°2°. Typical 63°17° / 43°6°. Dry. Forecasts agree.
1. Afternoon
  noon–6 PM
  Sunny, 63°17°
  Dry
2. Evening
  6 PM–midnight
  Clear, 51°11°
  Dry
3. Overnight
  midnight–6 AM
  Clear, 37°3°
  Dry
Official NWS forecast
Today: Sunny, with a high near 63. South wind around 1 mph.
Tonight: Patchy frost after 4am. Clear, with a low around 36. East wind around 1 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
59°15°–63°17°
Low, likely
34°1°–36°2°
Typical high / low
63°17° / 43°6°
Wind
6 mph9 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 65°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, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 53°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 41°5°
  Dry
Official NWS forecast
Day: Patchy frost before 9am. Sunny, with a high near 65. Southwest wind around 2 mph.
Night: Mostly clear, with a low around 40. Northwest wind around 1 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
61°16°–65°18°
Low, likely
34°1°–40°4°
Typical high / low
62°17° / 42°6°
Wind
7 mph11 km/h
UV peak
4
Monday, Oct 26. Partly sunny. High 70°21°, low 46°8°. Typical 62°17° / 42°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Mostly cloudy, 41°5°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 48°9°
  Dry
Official NWS forecast
Day: Mostly sunny, with a high near 70. West wind 1 to 7 mph.
Night: Mostly clear, with a low around 46.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
66°19°–70°21°
Low, likely
37°3°–46°8°
Typical high / low
62°17° / 42°6°
Wind
9 mph14 km/h, gusts 15 mph23 km/h
UV peak
4
Tuesday, Oct 27. Cloudy. High 66°19°, low 40°4°. Typical 62°17° / 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
  Clear, 41°5°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 66.
Night: Partly cloudy, with a low around 40.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
61°16°–66°19°
Low, likely
40°4°–47°8°
Typical high / low
62°17° / 42°6°
Wind
9 mph15 km/h, gusts 20 mph32 km/h
UV peak
4
Wednesday, Oct 28. Cloudy. High 64°18°, low 45°7°. Typical 61°16° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 40°4°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 60°16°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 44°7°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 64.
Night: Partly cloudy, with a low around 45.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
59°15°–64°18°
Low, likely
37°3°–45°7°
Typical high / low
61°16° / 42°6°
Wind
6 mph10 km/h, gusts 15 mph24 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 71°22°, low 47°8°. Typical 61°16° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 44°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 56°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 46°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 71.
Night: Mostly clear, with a low around 47.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–71°22°
Low, likely
41°5°–47°8°
Typical high / low
61°16° / 41°5°
Wind
6 mph10 km/h, gusts 21 mph33 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 74°23°, low 49°9°. Typical 60°16° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 45°7°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Clear, 59°15°
  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 74.
Night: Mostly clear, with a low around 49.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
69°21°–74°23°
Low, likely
42°6°–49°9°
Typical high / low
60°16° / 41°5°
Wind
8 mph13 km/h, gusts 24 mph38 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 69°21°, low 47°8°. Typical 60°16° / 40°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 52°11°
  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°–72°22°
Low, likely
43°6°–50°10°
Typical high / low
60°16° / 40°4°
Wind
6 mph10 km/h, gusts 27 mph44 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 68°20°, low 51°11°. Typical 60°16° / 40°4°. Rain 0.02 in0.5 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 52°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 68°20°
  20% chance
3. Evening
  6 PM–midnight
  Drizzle, 59°15°
  30% chance
4. Overnight
  midnight–6 AM
  Showers, 57°14°
  30% chance · 0.15 in3.8 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
63°17°–71°22°
Low, likely
49°9°–53°12°
Typical high / low
60°16° / 40°4°
Wind
9 mph14 km/h, gusts 16 mph26 km/h
UV peak
2
Monday, Nov 2. Showers. High 68°20°, low 58°14°. Typical 59°15° / 40°4°. Rain 0.49 in12 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Showers, 59°15°
  30% chance · 0.12 in3.1 mm
2. Afternoon
  noon–6 PM
  Drizzle, 68°20°
  30% chance · 0.05 in1.4 mm
3. Evening
  6 PM–midnight
  Drizzle, 64°18°
  30% chance · 0.1 in2.6 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
64°18°–71°22°
Low, likely
57°14°–58°14°
Typical high / low
59°15° / 40°4°
Wind
8 mph13 km/h, gusts 17 mph28 km/h

10 days15 days30 days

The outlook

Today
Dry, high 63°, low 36°.
Tomorrow
Dry, high 65°, low 40°.
Monday
Dry, high 70°, low 46°, warming up.
Rest of week
Mostly dry, highs 64–74°.

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

Swatara Creek near Hershey

3.3 mi

Below flood stage

Level: 1.8 ft
Flow: 318 cfs

Forecast peak 1.8 ft Sat 2 PM

Reading from Sat 11:45 AM · NWS gauge page

Swatara Creek at Middletown

5.1 mi

Below flood stage

Level: 2.2 ft

Forecast peak 2.2 ft Sat 2 PM

Reading from Sat 11:15 AM · NWS gauge page

Susquehanna River at Harrisburg

9.2 mi

Below flood stage

Level: 3.7 ft
Flow: 11,900 cfs

Forecast peak 3.7 ft Sat 2 PM

Reading from Sat 11:31 AM · NWS gauge page

Yellow Breeches Creek near Camp Hill

10 mi

Below flood stage

Level: 1.2 ft
Flow: 134 cfs

Forecast peak 1.2 ft Sat 2 PM

Reading from Sat 11:45 AM · 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 93

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 26
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 19 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 34°F).

Open the windows?

Today, 2:00 PM–5:00 PM

Good stretch to open the windows.

Is this typical?

Middletown Harrisburg Int'l Airport · official normals 1991–2020 · records 1888–2026

Oct 24, today vs a typical year

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

Last 7 days vs normal

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

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

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

Sun & moon

Sun

Daylight: 10 h 47 min; Losing 2 min 30 s a day; shortest Dec 21, 1 h 29 min less
Golden hour: 5:36–6:31 PM; Morning 7:10–8:05 AM
Blue hour: 6:31–6:41 PM; Morning 6:59–7:10 AM; first light 6:59 AM

Stars tonight? Fair

Clear 6:41 PM–7 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:39 AM · rises 5:10 PM
Full moon: Oct 26
New moon: Nov 9

Looking northwest from Hummelstown. The highest point on the skyline is about 2,000 ft, 34 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

Hummelstown, PA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Swatara Creek near Hershey

Swatara Creek at Middletown

Susquehanna River at Harrisburg

Yellow Breeches Creek near Camp Hill

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? Fair

Moon