Annual mean 11°C · wettest around May · prevailing wind W
Warmest
27.9 °C
Coldest
-0.2 °C
Wettest
21%
Windiest
4.4 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 Williamsport over the whole year is 11°C. July is the hottest month, with highs of about 28°C; January is the coldest, with lows of about -3°C. Williamsport has no sharply defined rainy season: the chance of rain on a given day runs from 17% in January, the driest month, to 24% in May, the wettest. Winds in Williamsport are highest in March, averaging 3.3 m/s (12 km/h), and lightest in September, at 1.7 m/s (6 km/h). The prevailing wind is from the W. The clearest skies in Williamsport come in July, when the sky is typically 40% covered; January is the cloudiest month, at 62%.
Month by month Williamsport 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
0°C
-3°C
-5°C
17%
62%
2.9 m/s
0
0
5
February
3°C
-2°C
-2°C
21%
55%
2.9 m/s
1
0
11
March
8°C
1°C
2°C
18%
51%
3.3 m/s
6
0
29
April
14°C
6°C
9°C
21%
52%
3.0 m/s
26
2
57
May
19°C
12°C
17°C
24%
52%
2.4 m/s
59
16
68
June
25°C
17°C
24°C
20%
42%
2.3 m/s
69
39
44
July
28°C
19°C
28°C
20%
40%
1.9 m/s
42
68
12
August
26°C
18°C
27°C
19%
46%
1.8 m/s
54
61
22
September
22°C
14°C
22°C
20%
47%
1.7 m/s
72
31
54
October
16°C
9°C
14°C
19%
54%
2.1 m/s
43
7
73
November
8°C
2°C
4°C
19%
48%
2.5 m/s
8
0
34
December
3°C
-1°C
-2°C
20%
62%
2.6 m/s
0
0
9
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 Williamsport weather by season
Year round, Williamsport has days of about 0°C at their warmest in January, its coolest month, and 28°C in July, its warmest; the coolest hours of the day run from -3°C to 19°C through the year, and the average temperature over the year is 11°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.
Williamsport weather in winterDecember to February
High 2°CLow -2°CRain 19%
Winter in Williamsport has typical daily highs of about 2°C and lows of about -2°C, with a 19% chance of rain on a given day.
Williamsport weather in springMarch to May
High 14°CLow 6°CRain 21%
Spring in Williamsport has typical daily highs of about 14°C and lows of about 6°C, with a 21% chance of rain on a given day.
Williamsport weather in summerJune to August
High 26°CLow 18°CRain 20%
Summer in Williamsport has typical daily highs of about 26°C and lows of about 18°C, with a 20% chance of rain on a given day.
Williamsport weather in autumnSeptember to November
High 16°CLow 9°CRain 19%
Autumn in Williamsport has typical daily highs of about 16°C and lows of about 9°C, with a 19% chance of rain on a given day.
When is the rainy season in Williamsport?
Williamsport has no sharply defined rainy season: the chance of rain on a given day runs from 17% in January, the driest month, to 24% in May, the wettest.
What time of year is Williamsport windiest?
Winds in Williamsport are highest in March, averaging 3.3 m/s (12 km/h), and lightest in September, at 1.7 m/s (6 km/h). The prevailing wind is from the W.
What is the average temperature in Williamsport year round?
The average temperature in Williamsport over the whole year is 11°C. July is the hottest month, with highs of about 28°C; January is the coldest, with lows of about -3°C.