Hamilton weather in August
In August, Hamilton has daytime highs averaging 14 °C, nights around 6.1 °C, with 15 wet days. Figures are 1991–2020 climate normals.
- 13.6°C Average high
- 6.1°C Average low
- 15days Wet days
- 121mm Rainfall
- 11h Daylight
Daily temperatures through August
How August develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 August | 13.6 °C | 6.2 °C | 50 % |
| 11–20 August | 13.4 °C | 6.2 °C | 54 % |
| 21–31 August | 13.9 °C | 6.0 °C | 39 % |
- Rain is most likely over days 11–20 of August (54 % of days) and least likely over days 21–31 (39 %).
What to expect
| Measure | Typical August | Share of the month |
|---|---|---|
| Days above 25 °C | 0 of 31 | 0 % |
| Days above 30 °C | 0 of 31 | 0 % |
| Days below 0 °C | 1.8 of 31 | 6 % |
| Days with more than 1 mm rain | 15 of 31 | 47 % |
Conditions in August
| Measure | Average |
|---|---|
| Mean temperature | 9.6 °C |
| Record high (1991–2020) | 18 °C |
| Record low (1991–2020) | -3.4 °C |
| Relative humidity | 84 % |
| Wind speed | 22 km/h |
| Cloud cover | 61 % |
Where Hamilton ranks in August
| Ranking | Position | Value |
|---|---|---|
| The coolest places in the world in August | 19th of 50 | 14 °C |
August compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| June | 13.8 °C | 114 mm | 60 % |
| July | 13.1 °C | 124 mm | 60 % |
| August | 13.6 °C | 121 mm | 61 % |
| September | 15.1 °C | 113 mm | 64 % |
| October | 16.6 °C | 100 mm | 64 % |
See all twelve months for Hamilton
- August is the 11th warmest month here.
- It is the 11th driest month of the year.
- It ranks 8th for least cloud cover.
- Days last about 11 hours from sunrise to sunset.
- It rains on 15 of 31 days — 47 % of the month.
- Nights are about 7.6 °C cooler than the middle of the day.
- The hottest August day on record since 1991 reached 18 °C, 4.2 °C above the usual daytime high.
QuestionsAugust in Hamilton, answered
How warm is Hamilton in August?
Daily highs average 14 °C and nights fall to about 6.1 °C, a spread of 7.6 °C between afternoon and dawn. That makes August the 11th warmest month of the year here.
Does it rain much in Hamilton in August?
August averages 121 mm of rain, spread over about 15 of the 31 days — 47 % of the month. Cloud cover averages 61 % of the sky.
How long are the days in August?
Hamilton averages 11 hours between sunrise and sunset in August. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.