This is the short version of Hamilton climate: monthly averages, with the monthly detail underneath. The gap between Jan and Jul is 28.5 C here: -6.2 C against 22.3 C. No month dominates: the wettest is Jul at 2.50 mm/day, the driest Jan at 1.64 mm/day. Taken together that is roughly 769 mm of rain a year for the grid cell. Because each page is rebuilt independently, one unavailable upstream never takes the rest of the site down. Scroll for the month-by-month figures, or jump to a neighbouring location from the links below.
Annual mean temperature 8.1 C
Warmest month Jul (22.3 C)
Coldest month Jan (-6.2 C)
Wettest month Jul (2.50 mm/day)
All-time record high 38.3 C
All-time record low -31.4 C
Annual precipitation 770 mm / year
Coordinates 43.25011, -79.84963
Population 569,353
Average monthly temperature and rainfall in Hamilton
Month
Mean temp (C)
Rain (mm/day)
Record high (C)
Record low (C)
Jan
-6.2
1.64
13.2
-27.7
Feb
-6.0
1.70
15.7
-31.4
Mar
-0.7
1.68
25.9
-26.2
Apr
5.7
2.32
25.3
-18.0
May
12.8
2.38
33.0
-4.0
Jun
18.8
2.43
36.0
3.4
Jul
22.3
2.50
37.0
6.8
Aug
21.5
2.03
38.3
8.2
Sep
17.4
2.32
35.5
2.8
Oct
9.7
2.40
30.2
-5.0
Nov
3.1
2.09
22.5
-14.2
Dec
-2.7
1.79
16.5
-24.3
What the Hamilton climate table shows
Values are multi-decadal climatological averages for the 43.25011, -79.84963 grid cell, not a single year. Rain is the daily mean, so a value of 2.00 mm/day is about 60 mm across a 30-day month. Averages smooth over extremes, so use them for planning rather than for what to pack for next Tuesday.
Frequently asked questions
Why do the numbers differ from a weather app?
An app shows one location on one day. These are long-run averages, so they smooth out single hot or cold spells.
How much rain is 2.50 mm/day in a month?
Rain is recorded as a daily mean, so 2.50 mm/day is roughly 76 mm across a 30-day month.