Annual mean 13°C · wettest around May · prevailing wind W
Warmest
29.1 °C
Coldest
1.7 °C
Wettest
24%
Windiest
4.5 m/s
Prevailing
W
3.4 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Harrisburg over the whole year is 13°C. July is the hottest month, with highs of about 29°C; January is the coldest, with lows of about -2°C. Harrisburg has no sharply defined rainy season: the chance of rain on a given day runs from 20% in January, the driest month, to 28% in May, the wettest. Winds in Harrisburg are highest in March, averaging 3.3 m/s (12 km/h), and lightest in August, at 1.7 m/s (6 km/h). The prevailing wind is from the W. The clearest skies in Harrisburg come in July, when the sky is typically 40% covered; January is the cloudiest month, at 57%.
Month by month Harrisburg climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
2°C
-2°C
-3°C
20%
57%
2.9 m/s
1
0
8
February
5°C
-0°C
-1°C
24%
52%
2.8 m/s
2
0
16
March
9°C
2°C
4°C
21%
50%
3.3 m/s
10
0
36
April
15°C
8°C
11°C
24%
52%
3.1 m/s
32
3
61
May
20°C
13°C
18°C
28%
55%
2.5 m/s
60
18
64
June
26°C
18°C
25°C
24%
43%
2.3 m/s
62
44
36
July
29°C
21°C
30°C
23%
40%
1.8 m/s
29
64
7
August
27°C
19°C
28°C
22%
45%
1.7 m/s
43
60
16
September
23°C
16°C
23°C
25%
46%
1.8 m/s
68
36
46
October
18°C
10°C
15°C
24%
49%
2.0 m/s
51
9
72
November
10°C
4°C
6°C
22%
44%
2.4 m/s
13
0
43
December
5°C
0°C
-0°C
25%
55%
2.4 m/s
0
0
14
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Harrisburg weather by season
Year round, Harrisburg has days of about 2°C at their warmest in January, its coolest month, and 29°C in July, its warmest; the coolest hours of the day run from -2°C to 21°C through the year, and the average temperature over the year is 13°C around the clock. Rain is most likely around May and least likely around January. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Harrisburg weather in winterDecember to February
High 4°CLow -1°CRain 23%
Winter in Harrisburg has typical daily highs of about 4°C and lows of about -1°C, with a 23% chance of rain on a given day.
Harrisburg weather in springMarch to May
High 15°CLow 8°CRain 24%
Spring in Harrisburg has typical daily highs of about 15°C and lows of about 8°C, with a 24% chance of rain on a given day.
Harrisburg weather in summerJune to August
High 27°CLow 19°CRain 23%
Summer in Harrisburg has typical daily highs of about 27°C and lows of about 19°C, with a 23% chance of rain on a given day.
Harrisburg weather in autumnSeptember to November
High 17°CLow 10°CRain 24%
Autumn in Harrisburg has typical daily highs of about 17°C and lows of about 10°C, with a 24% chance of rain on a given day.
When is the rainy season in Harrisburg?
Harrisburg has no sharply defined rainy season: the chance of rain on a given day runs from 20% in January, the driest month, to 28% in May, the wettest.
What time of year is Harrisburg windiest?
Winds in Harrisburg are highest in March, averaging 3.3 m/s (12 km/h), and lightest in August, at 1.7 m/s (6 km/h). The prevailing wind is from the W.
What is the average temperature in Harrisburg year round?
The average temperature in Harrisburg over the whole year is 13°C. July is the hottest month, with highs of about 29°C; January is the coldest, with lows of about -2°C.