Chatham in Summer
In summer (June, July and August), Chatham sees average daytime highs around 26°C and overnight lows near 17°C, with 256 mm of rain over about 33 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Over the season highs climb from about 23°C in early June to 25°C by late August. The sky is clear or mostly clear about 35% of the time across summer, and the air most often feels humid.
Summer is Chatham's best season of the year to visit on our travel score. For the whole year in context, see Chatham's year-round climate.
- Avg daytime high
- 26°C
- warmest season of the year
- Avg overnight low
- 17°C
- Rainfall
- 256 mm
- 33 wet days
- Avg wind
- 12 km/h
- Travel score
- 6.6
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Chatham in Summer
Over the season highs climb from about 23°C in early June to 25°C by late August.
A typical summer day in Chatham reaches about 26°C and drops to 17°C overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Chatham
Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Chatham weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | -1° / -7° | 66 | 10.5 | 6.6 | 9.3 | 0.0 |
| Feb | 0° / -7° | 54 | 8.5 | 6 | 10.3 | 0.0 |
| Mar | 6° / -3° | 66 | 10.2 | 4.4 | 11.6 | 0.5 |
| Apr | 13° / 4° | 89 | 12.2 | 1.3 | 13.1 | 3.3 |
| May | 19° / 10° | 92 | 12.3 | 0 | 14.4 | 5.7 |
| Jun | 25° / 15° | 94 | 11.2 | 0 | 15 | 6.6 |
| Jul | 27° / 18° | 86 | 11.1 | 0 | 14.8 | 6.5 |
| Aug | 26° / 17° | 77 | 10.4 | 0 | 13.7 | 6.8 |
| Sep | 22° / 13° | 73 | 8.7 | 0 | 12.3 | 6.9 |
| Oct | 15° / 7° | 76 | 10.3 | 0 | 10.8 | 4.6 |
| Nov | 8° / 2° | 71 | 9.7 | 1.9 | 9.6 | 1.4 |
| Dec | 2° / -3° | 63 | 10.1 | 5 | 9 | 0.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 35% of the time across summer.
Chance of precipitation in Summer
Chatham gets around 256 mm of rain over 33 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 12 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 54 min in early June to 13 h 06 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 6.1 kWh/m².
Is summer a good time to visit Chatham?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a reasonable time to visit Chatham for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Chatham in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Chatham sees daytime highs around 26°C and nights near 17°C. Pack sun protection. Worth having: light clothes and rain gear. About 33 days see rain.
Sea temperature near Chatham in Summer
The nearest coast averages about 21°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 32 km away) is warmest in August at about 24°C and coldest in February near 1°C.
It's comfortable for a long swim from Jun 29 to Sep 23 — about 2.9 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 2 | 1 | 1 | 5 | 11 | 18 | 23 | 24 | 21 | 16 | 10 | 5 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Refreshing | Refreshing | Cool | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 2 | Bracing |
| Feb | 1 | Bracing |
| Mar | 1 | Bracing |
| Apr | 5 | Bracing |
| May | 11 | Bracing |
| Jun | 18 | Cool |
| Jul | 23 | Refreshing |
| Aug | 24 | Refreshing |
| Sep | 21 | Refreshing |
| Oct | 16 | Cool |
| Nov | 10 | Bracing |
| Dec | 5 | Bracing |
UV index in Chatham in Summer
Clear-sky midday UV across summer averages around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Chatham peaks around June 21 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 2 | 4 | 6 | 7 | 9 | 9 | 7 | 6 | 3 | 2 | 1 |
| Level | Low | Moderate | Moderate | High | High | Very high | Very high | High | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 2 | Moderate |
| Mar | 4 | Moderate |
| Apr | 6 | High |
| May | 7 | High |
| Jun | 9 | Very high |
| Jul | 9 | Very high |
| Aug | 7 | High |
| Sep | 6 | High |
| Oct | 3 | Moderate |
| Nov | 2 | Moderate |
| Dec | 1 | Low |
Where is Chatham?
Chatham sits at 42.4°N, 82.2°W, 183 m above sea level, in Canada. The nearest listed city is Leamington, 53 km away.
Topography around Chatham
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Chatham.
Within 3 km, the terrain around Chatham has only modest variations in elevation — a maximum elevation change of 27 m around an average of 182 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 62 m; within 80 km, only modest variations in elevation — a maximum elevation change of 159 m.
The land around Chatham is covered by artificial surfaces (34%), trees (26%) and cropland (25%) within 3 km, cropland (88%) within 16 km, and water (44%) and cropland (36%) within 80 km.
Canada travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 83% of US
- price level, 2025
- GDP per capita
- $55,698
- 2025
- Happiness
- 6.7 / 10
- World Happiness, 2025
- Safe drinking water
- 97%
- of population, 2024
- Homicide rate
- 2
- per 100k, 2023
- Road deaths
- 5.3
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Chatham (42.4122°, -82.1849°, elevation 183 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.