Annual mean 9°C · wettest around February · prevailing wind SW
Warmest
18.2 °C
Coldest
4.4 °C
Wettest
42%
Windiest
7.6 m/s
Prevailing
SW
5.6 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
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 Hamilton over the whole year is 9°C. July is the hottest month, with highs of about 17°C; January is the coldest, with lows of about 3°C. The rainy (wet) season in Hamilton runs from February, peaking in February with a 32% chance of rain on a given day. The dry season is March to September; April is the driest month, at 14%. Winds in Hamilton are highest in February, averaging 6.4 m/s (23 km/h), and lightest in July, at 4.3 m/s (15 km/h). The prevailing wind is from the SW. The clearest skies in Hamilton come in April, when the sky is typically 60% covered; December is the cloudiest month, at 71%.
Month by month Hamilton 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
5°C
3°C
-1°C
23%
69%
5.4 m/s
0
0
5
February
6°C
4°C
-1°C
32%
69%
6.4 m/s
0
0
7
March
8°C
4°C
2°C
20%
67%
4.8 m/s
1
0
21
April
10°C
5°C
5°C
14%
60%
4.5 m/s
2
0
37
May
14°C
9°C
9°C
19%
62%
4.6 m/s
13
0
64
June
16°C
11°C
12°C
17%
66%
4.6 m/s
27
1
74
July
17°C
13°C
14°C
17%
69%
4.3 m/s
46
3
81
August
17°C
12°C
14°C
22%
67%
4.3 m/s
41
1
81
September
15°C
11°C
11°C
20%
65%
4.4 m/s
24
1
75
October
11°C
8°C
7°C
28%
68%
5.1 m/s
2
0
49
November
8°C
5°C
3°C
23%
66%
4.7 m/s
0
0
23
December
5°C
4°C
0°C
26%
71%
4.9 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 Hamilton weather by season
Year round, Hamilton has days of about 5°C at their warmest in January, its coolest month, and 17°C in July, its warmest; the coolest hours of the day run from 3°C to 13°C through the year, and the average temperature over the year is 9°C around the clock. Rain is most likely around February and least likely around April. 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.
Hamilton weather in winterDecember to February
High 5°CLow 4°CRain 27%
Winter in Hamilton has typical daily highs of about 5°C and lows of about 4°C, with a 27% chance of rain on a given day.
Hamilton weather in springMarch to May
High 10°CLow 6°CRain 18%
Spring in Hamilton has typical daily highs of about 10°C and lows of about 6°C, with a 18% chance of rain on a given day.
Hamilton weather in summerJune to August
High 16°CLow 12°CRain 19%
Summer in Hamilton has typical daily highs of about 16°C and lows of about 12°C, with a 19% chance of rain on a given day.
Hamilton weather in autumnSeptember to November
High 11°CLow 8°CRain 24%
Autumn in Hamilton has typical daily highs of about 11°C and lows of about 8°C, with a 24% chance of rain on a given day.
When is the rainy season in Hamilton?
The rainy (wet) season in Hamilton runs from February, peaking in February with a 32% chance of rain on a given day. The dry season is March to September; April is the driest month, at 14%.
What time of year is Hamilton windiest?
Winds in Hamilton are highest in February, averaging 6.4 m/s (23 km/h), and lightest in July, at 4.3 m/s (15 km/h). The prevailing wind is from the SW.
What is the average temperature in Hamilton year round?
The average temperature in Hamilton over the whole year is 9°C. July is the hottest month, with highs of about 17°C; January is the coldest, with lows of about 3°C.