Annual mean 13°C · wettest around May · prevailing wind W
Warmest
28.8 °C
Coldest
1.6 °C
Wettest
43%
Windiest
4.7 m/s
Prevailing
W
3.5 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 Chambersburg over the whole year is 13°C. July is the hottest month, with highs of about 28°C; January is the coldest, with lows of about -2°C. Chambersburg has no sharply defined rainy season: the chance of rain on a given day runs from 32% in January, the driest month, to 45% in May, the wettest. Winds in Chambersburg are highest in March, averaging 3.5 m/s (13 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 Chambersburg come in July, when the sky is typically 34% covered; January is the cloudiest month, at 53%.
Month by month Chambersburg 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
-4°C
32%
53%
3.2 m/s
1
0
9
February
5°C
0°C
-0°C
34%
48%
3.2 m/s
3
0
18
March
9°C
3°C
4°C
35%
46%
3.5 m/s
10
0
36
April
15°C
8°C
11°C
39%
46%
3.2 m/s
33
4
57
May
20°C
13°C
18°C
45%
53%
2.4 m/s
55
18
62
June
25°C
18°C
25°C
41%
38%
2.3 m/s
62
42
36
July
28°C
21°C
30°C
40%
34%
1.8 m/s
31
62
9
August
27°C
19°C
28°C
39%
39%
1.7 m/s
46
58
17
September
23°C
16°C
23°C
41%
40%
1.8 m/s
65
35
47
October
18°C
11°C
15°C
40%
42%
2.2 m/s
49
10
68
November
10°C
4°C
6°C
32%
40%
2.7 m/s
12
0
41
December
4°C
1°C
-1°C
37%
50%
2.8 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 Chambersburg weather by season
Year round, Chambersburg has days of about 2°C at their warmest in January, its coolest month, and 28°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.
Chambersburg weather in winterDecember to February
High 3°CLow -0°CRain 34%
Winter in Chambersburg has typical daily highs of about 3°C and lows of about -0°C, with a 34% chance of rain on a given day.
Chambersburg weather in springMarch to May
High 15°CLow 8°CRain 40%
Spring in Chambersburg has typical daily highs of about 15°C and lows of about 8°C, with a 40% chance of rain on a given day.
Chambersburg weather in summerJune to August
High 27°CLow 19°CRain 40%
Summer in Chambersburg has typical daily highs of about 27°C and lows of about 19°C, with a 40% chance of rain on a given day.
Chambersburg weather in autumnSeptember to November
High 17°CLow 10°CRain 38%
Autumn in Chambersburg has typical daily highs of about 17°C and lows of about 10°C, with a 38% chance of rain on a given day.
When is the rainy season in Chambersburg?
Chambersburg has no sharply defined rainy season: the chance of rain on a given day runs from 32% in January, the driest month, to 45% in May, the wettest.
What time of year is Chambersburg windiest?
Winds in Chambersburg are highest in March, averaging 3.5 m/s (13 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 Chambersburg year round?
The average temperature in Chambersburg over the whole year is 13°C. July is the hottest month, with highs of about 28°C; January is the coldest, with lows of about -2°C.