Harrisburg, PA weather and climate in 2025
Day
30 °C
Night
18 °C
Sea
0 °C
Precipitation
100 mm
in month
Rainy days
11 days
in month
Daylight
15 hours
average
Sunshine
10 hours
average
Humidity
69 %
Day
30 °C
Night
18 °C
Sea
0 °C
Precipitation
100 mm
in month
Rainy days
11 days
in month
Daylight
15 hours
average
Sunshine
10 hours
average
Humidity
69 %
Overview: Harrisburg, PA
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Weather overview for Harrisburg, PA
Weather overview
Harrisburg, PA, enjoys all four seasons, each with its distinct character. The winter months bring chilly days with average high temperatures hovering around 3 °C (38 °F) in January, warming up slightly by March to 10 °C (50 °F). As the calendar turns, springtime blooms with moderate temperatures and the commencement of April's showers. By summer, the mercuy peaks with average daily highs of 30 °C (86 °F) in July, often coupled with humidity. The autumn leaves fall as the temperatures begin to cool, revealing the transition back to colder days, evidenced by a comfortable 19 °C (65 °F) in October.
January weather
Harrisburg greets January with icy breath as night temperatures can plummet to an average of -6 °C (22 °F). While daytime provides some solace at 3 °C (38 °F), the month still demands the wraps of winter. Frequent precipitation marks the month with 68 mm (2.69 in), mainly as snow, translating to 12 days of cloudy weather.
February weather
As February's chill persists, valiant attempts by the sun to warm Harrisburg yield an average high of 5 °C (41 °F). Nights remain frosty with lows around -5 °C (23 °F). Wet days are slightly fewer, but with 69 mm (2.73 in) of precipitation over 11 days, it's still wise to keep an umbrella close.
March weather
March hints at the first breath of spring, although the nip in the air is still felt with night temperatures averaging -1 °C (31 °F). Daytimes get milder, peaking at around 10 °C (50 °F), but the mercurial weather means rainchecks with over 86 mm (3.38 in) of rainfall spread over 12 days.
April weather
April showers breathe life into May flowers, indeed. Harrisburg sees an increase in sun hours to approximately 8 hours a day. However, with 87 mm (3.41 in) of rain scattered across 12 days, it's clear the rain boots won't be collecting dust.
May weather
May brings a welcomed warmth to Harrisburg, with the mercury rising to a pleasant average high of 23 °C (73 °F). The nights are getting much cozier too, averaging 10 °C (50 °F). A slight increase in precipitation to 107 mm (4.22 in) indicates that spring showers are still part of the month's repertoire.
June weather
June marks the beginning of summer, and temperatures reflect this with an average high of 28 °C (82 °F). Nights also warm up considerably to an average of 15 °C (60 °F), while humidity increases. Pools and air conditioning units start to see more use as the rain doesn't shy away, contributing to 103 mm (4.06 in) of precipitation.
July weather
July stands at the summit of summer for Harrisburg, flaunting an average high of 30 °C (86 °F). The sultry nights average 18 °C (64 °F), while humidity can make the air feel thicker. Amidst this heat, showers do occur, with 100 mm (3.95 in) of rain spread through 11 days.
August weather
August sees a slight dip in temperature, but with an average high of 29 °C (84 °F), it's not by much. The evenings remain mild at 17 °C (63 °F). With rain still a constant companion delivering 86 mm (3.40 in) of precipitation, the fading summer continues to be wet.
September weather
September whispers the promise of fall with a decrease in humidity and an average high temperature of 25 °C (77 °F). The increase in wind speed to 2 m/s offers a refreshing change, while the sun sets earlier, leaving behind 102 mm (4.01 in) of rain over 9 days.
October weather
In October, Harrisburg's leaves turn hues of amber and gold as the high temperature settles at 19 °C (65 °F). The crisp nights average around 6 °C (43 °F), and the rainfall eases up with 84 mm (3.32 in), progressing toward drier, cooler days.
November weather
November's chill starts to creep in, with the daytime temperatures dropping to an average of 12 °C (54 °F). The wind begins to pick up, reminding Harrisburg's residents to keep their coats close. Rainfall continues its descent to 85 mm (3.36 in) over an average of 11 days.
December weather
December wraps Harrisburg in a cold embrace, with daytime highs reaching only 5 °C (42 °F) on average. As the festive season approaches, frosty nights and a mean wind speed of 3 m/s become more common. Despite dwindling sun hours, rain and snow frequent the region, amounting to 84 mm (3.31 in) of precipitation.
FAQs
What kind of outerwear should I prepare for Harrisburg in January?
In January, you'd want to bundle up in warm layers, insulated jackets, gloves, and hats—a must to combat the average 3 °C (38 °F) daytime temperatures and possible nightly lows of -6 °C (22 °F).
Will I see any snow in Harrisburg during February?
Snow can certainly grace the city in February, adding to the wintry charm with precipitation of 69 mm (2.73 in) across 11 days of the month.
Are the temperatures in March indicative of spring in Harrisburg?
March in Harrisburg straddles the line between winter and spring, with daytime averages of 10 °C (50 °F), hinting at milder times ahead but nights that still cling to winter's chill with -1 °C (31 °F).
What is the average rainfall Harrisburg experiences in April?
April ensures the earth stays well-watered in Harrisburg with an average rainfall of 87 mm (3.41 in) throughout 12 days of the month.
Can I start wearing shorts in Harrisburg during May?
With the average high hitting 23 °C (73 °F), May is a great month to bring out those shorts during the day, although evenings could still be a bit brisk.
What's the typical daytime temperature in Harrisburg during June?
Typical daytime temperatures in June in Harrisburg hover around a balmy 28 °C (82 °F), perfectly suited for outdoor summer activities.
Are July days in Harrisburg very hot?
July in Harrisburg can be quite steamy, with average highs reaching 30 °C (86 °F), so it's a great time to hit the pool or stay cool indoors.
Is August still considered hot in Harrisburg?
Yes, August is definitely on the hot side in Harrisburg with daytime temps averaging 29 °C (84 °F), suggesting that summer is still in full swing.
Does September in Harrisburg have comfortable temperatures?
September strikes a comfortable balance in Harrisburg, with the average daily high at a pleasant 25 °C (77 °F), ushering in the start of fall.
What's the typical weather like in Harrisburg during October?
Typical October weather in Harrisburg is idyllic for sweater enthusiasts, with daytime averages a cool 19 °C (65 °F) and nights dipping to 6 °C (43 °F).
How cold does it get in Harrisburg during November?
November in Harrisburg ushers in a notable chill, with daytime temps sinking to an average of 12 °C (54 °F) and nights getting even colder, indicating the approach of winter.
Can I expect a white Christmas in Harrisburg?
A white Christmas is certainly within the realm of possibility in Harrisburg, with December seeing a mix of rain and snow adding up to 84 mm (3.31 in) of precipitation.
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