Annual mean 8°C · wettest around January · prevailing wind W
Warmest
25.5 °C
Coldest
-4.2 °C
Wettest
30%
Windiest
5.8 m/s
Prevailing
W
4.7 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 Waterloo over the whole year is 8°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about -6°C. Waterloo has no sharply defined rainy season: the chance of rain on a given day runs from 11% in July, the driest month, to 22% in January, the wettest. Winds in Waterloo are highest in February, averaging 4.4 m/s (16 km/h), and lightest in July, at 2.7 m/s (10 km/h). The prevailing wind is from the W. The clearest skies in Waterloo come in July, when the sky is typically 35% covered; December is the cloudiest month, at 77%.
Month by month Waterloo 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
-4°C
-6°C
-10°C
22%
75%
4.2 m/s
0
0
0
February
-2°C
-6°C
-8°C
21%
67%
4.4 m/s
0
0
2
March
3°C
-2°C
-3°C
18%
58%
4.3 m/s
0
0
9
April
9°C
2°C
3°C
20%
55%
4.2 m/s
7
0
32
May
17°C
9°C
13°C
15%
45%
3.4 m/s
40
7
63
June
23°C
15°C
20°C
14%
40%
3.3 m/s
69
24
61
July
25°C
17°C
24°C
11%
35%
2.7 m/s
72
47
37
August
24°C
15°C
23°C
12%
36%
2.7 m/s
76
43
43
September
21°C
12°C
19°C
12%
40%
2.8 m/s
66
18
68
October
13°C
7°C
10°C
18%
55%
3.4 m/s
27
2
55
November
5°C
1°C
-0°C
19%
64%
3.9 m/s
4
0
17
December
-0°C
-3°C
-6°C
21%
77%
4.2 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 Waterloo weather by season
Year round, Waterloo has days of about -4°C at their warmest in January, its coolest month, and 25°C in July, its warmest; the coolest hours of the day run from -6°C to 17°C through the year, and the average temperature over the year is 8°C around the clock. Rain is most likely around January and least likely around July. 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.
Waterloo weather in winterDecember to February
High -2°CLow -5°CRain 21%
Winter in Waterloo has typical daily highs of about -2°C and lows of about -5°C, with a 21% chance of rain on a given day.
Waterloo weather in springMarch to May
High 9°CLow 3°CRain 18%
Spring in Waterloo has typical daily highs of about 9°C and lows of about 3°C, with a 18% chance of rain on a given day.
Waterloo weather in summerJune to August
High 24°CLow 16°CRain 12%
Summer in Waterloo has typical daily highs of about 24°C and lows of about 16°C, with a 12% chance of rain on a given day.
Waterloo weather in autumnSeptember to November
High 13°CLow 7°CRain 16%
Autumn in Waterloo has typical daily highs of about 13°C and lows of about 7°C, with a 16% chance of rain on a given day.
When is the rainy season in Waterloo?
Waterloo has no sharply defined rainy season: the chance of rain on a given day runs from 11% in July, the driest month, to 22% in January, the wettest.
What time of year is Waterloo windiest?
Winds in Waterloo are highest in February, averaging 4.4 m/s (16 km/h), and lightest in July, at 2.7 m/s (10 km/h). The prevailing wind is from the W.
What is the average temperature in Waterloo year round?
The average temperature in Waterloo over the whole year is 8°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about -6°C.