Annual mean 9°C · wettest around June · prevailing wind SW
Warmest
25.5 °C
Coldest
-7.4 °C
Wettest
97%
Windiest
5.5 m/s
Prevailing
SW
4.3 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 Rochester over the whole year is 9°C. July is the hottest month, with highs of about 26°C; January is the coldest, with lows of about -9°C. Rochester has no sharply defined rainy season: the chance of rain on a given day runs from 85% in September, the driest month, to 90% in June, the wettest. Winds in Rochester are highest in April, averaging 4.2 m/s (15 km/h), and lightest in July, at 2.7 m/s (10 km/h). The prevailing wind is from the SW. The clearest skies in Rochester come in September, when the sky is typically 24% covered; December is the cloudiest month, at 39%.
Month by month Rochester 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
-6°C
-9°C
-12°C
86%
38%
3.6 m/s
0
0
0
February
-4°C
-8°C
-10°C
85%
30%
3.9 m/s
0
0
3
March
4°C
-1°C
-2°C
86%
32%
3.9 m/s
1
0
11
April
10°C
4°C
4°C
89%
35%
4.2 m/s
11
0
33
May
18°C
11°C
14°C
89%
32%
3.3 m/s
44
6
62
June
24°C
17°C
22°C
90%
28%
3.3 m/s
65
31
44
July
26°C
19°C
25°C
89%
25%
2.7 m/s
61
49
29
August
24°C
17°C
23°C
86%
27%
2.7 m/s
67
38
40
September
21°C
14°C
19°C
85%
24%
3.2 m/s
62
18
58
October
13°C
7°C
8°C
86%
32%
3.7 m/s
22
1
47
November
4°C
0°C
-1°C
87%
31%
4.0 m/s
4
0
15
December
-3°C
-5°C
-8°C
85%
39%
3.8 m/s
0
0
2
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 Rochester weather by season
Year round, Rochester has days of about -6°C at their warmest in January, its coolest month, and 26°C in July, its warmest; the coolest hours of the day run from -9°C to 19°C through the year, and the average temperature over the year is 9°C around the clock. Rain is most likely around June and least likely around September. 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.
Rochester weather in winterDecember to February
High -4°CLow -7°CRain 85%
Winter in Rochester has typical daily highs of about -4°C and lows of about -7°C, with a 85% chance of rain on a given day.
Rochester weather in springMarch to May
High 11°CLow 5°CRain 88%
Spring in Rochester has typical daily highs of about 11°C and lows of about 5°C, with a 88% chance of rain on a given day.
Rochester weather in summerJune to August
High 25°CLow 18°CRain 88%
Summer in Rochester has typical daily highs of about 25°C and lows of about 18°C, with a 88% chance of rain on a given day.
Rochester weather in autumnSeptember to November
High 13°CLow 7°CRain 86%
Autumn in Rochester has typical daily highs of about 13°C and lows of about 7°C, with a 86% chance of rain on a given day.
When is the rainy season in Rochester?
Rochester has no sharply defined rainy season: the chance of rain on a given day runs from 85% in September, the driest month, to 90% in June, the wettest.
What time of year is Rochester windiest?
Winds in Rochester are highest in April, averaging 4.2 m/s (15 km/h), and lightest in July, at 2.7 m/s (10 km/h). The prevailing wind is from the SW.
What is the average temperature in Rochester year round?
The average temperature in Rochester over the whole year is 9°C. July is the hottest month, with highs of about 26°C; January is the coldest, with lows of about -9°C.