Walnut Grove in Summer
In summer (June, July and August), Walnut Grove sees average daytime highs around 21°C and overnight lows near 11°C, with 253 mm of rain over about 28 wet days across the season. It is the warmest season of the year and the driest season of the year.
Over the season highs climb from about 18°C in early June to 21°C by late August. The sky is clear or mostly clear about 34% of the time across summer, and the air most often feels dry.
Summer is Walnut Grove's best season of the year to visit on our travel score. For the whole year in context, see Walnut Grove's year-round climate.
- Avg daytime high
- 21°C
- warmest season of the year
- Avg overnight low
- 11°C
- Rainfall
- 253 mm
- 28 wet days
- Avg wind
- 5 km/h
- Travel score
- 6.7
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Walnut Grove in Summer
Over the season highs climb from about 18°C in early June to 21°C by late August.
A typical summer day in Walnut Grove reaches about 21°C and drops to 11°C overnight. The warmest of the three months is August, the coolest June.
How summer really feels in Walnut Grove
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.
Walnut Grove 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 | 5° / 1° | 343 | 19.6 | 8.4 | 8.5 | 0.1 |
| Feb | 7° / 1° | 209 | 15.7 | 7 | 9.8 | 0.6 |
| Mar | 9° / 2° | 281 | 19.9 | 7.4 | 11.6 | 1.4 |
| Apr | 13° / 4° | 198 | 17.4 | 1.8 | 13.4 | 2.8 |
| May | 17° / 7° | 134 | 13.2 | 0.3 | 15 | 4.8 |
| Jun | 19° / 10° | 108 | 12.5 | 0 | 15.9 | 5.6 |
| Jul | 22° / 12° | 60 | 7.8 | 0 | 15.6 | 7.2 |
| Aug | 22° / 12° | 84 | 8.1 | 0 | 14.2 | 7.2 |
| Sep | 19° / 10° | 142 | 11.2 | 0 | 12.4 | 5.9 |
| Oct | 13° / 6° | 271 | 16.8 | 0.2 | 10.5 | 3.1 |
| Nov | 8° / 3° | 380 | 20.3 | 4.9 | 8.9 | 0.9 |
| Dec | 5° / 1° | 329 | 19.5 | 10.2 | 8.1 | 0.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 34% of the time across summer.
Chance of precipitation in Summer
Walnut Grove gets around 253 mm of rain over 28 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 5 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 15 h 42 min in early June to 13 h 18 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 5.7 kWh/m².
Hazard calendar for Walnut Grove
None of Walnut Grove's seasonal hazards peak in summer. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
Walnut Grove's rainy season runs October–April, when most of the year's rain falls.
Is summer a good time to visit Walnut Grove?
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 Walnut Grove for sightseeing.
What to pack for Walnut Grove in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Walnut Grove sees daytime highs around 21°C and nights near 11°C. Pack sun protection. Worth having: light clothes and rain gear. About 28 days see rain.
Sea temperature near Walnut Grove in Summer
The nearest coast averages about 16°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 36 km away) is warmest in August at about 16°C and coldest in January near 7°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 7 | 7 | 8 | 10 | 12 | 14 | 16 | 16 | 14 | 11 | 9 | 8 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Bracing | Bracing | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 7 | Bracing |
| Feb | 7 | Bracing |
| Mar | 8 | Bracing |
| Apr | 10 | Bracing |
| May | 12 | Bracing |
| Jun | 14 | Bracing |
| Jul | 16 | Cool |
| Aug | 16 | Cool |
| Sep | 14 | Bracing |
| Oct | 11 | Bracing |
| Nov | 9 | Bracing |
| Dec | 8 | Bracing |
UV index in Walnut Grove in Summer
Clear-sky midday UV across summer averages around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Walnut Grove peaks around July 17 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 18 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 1 | 3 | 4 | 7 | 6 | 8 | 6 | 4 | 3 | 1 | 1 |
| Level | Low | Low | Moderate | Moderate | High | High | Very high | High | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 1 | Low |
| Mar | 3 | Moderate |
| Apr | 4 | Moderate |
| May | 7 | High |
| Jun | 6 | High |
| Jul | 8 | Very high |
| Aug | 6 | High |
| Sep | 4 | Moderate |
| Oct | 3 | Moderate |
| Nov | 1 | Low |
| Dec | 1 | Low |
Air quality in Walnut Grove in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Walnut Grove is worst in August — around 18 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (December, 9 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 12 | 13 | 16 | 16 | 17 | 15 | 15 | 18 | 14 | 13 | 9 | 9 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 12 | Moderate |
| Feb | 13 | Moderate |
| Mar | 16 | Moderate |
| Apr | 16 | Moderate |
| May | 17 | Moderate |
| Jun | 15 | Moderate |
| Jul | 15 | Moderate |
| Aug | 18 | Moderate |
| Sep | 14 | Moderate |
| Oct | 13 | Moderate |
| Nov | 9 | Good |
| Dec | 9 | Good |
Where is Walnut Grove?
Walnut Grove sits at 49.2°N, 122.6°W, 40 m above sea level, in Canada. The nearest listed city is Willoughby, 5.0 km away.
Topography around Walnut Grove
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Walnut Grove.
Within 3 km, the terrain around Walnut Grove has only modest variations in elevation — a maximum elevation change of 111 m around an average of 38 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 652 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,279 m.
The land around Walnut Grove is covered by trees (47%), artificial surfaces (28%) and grassland (23%) within 3 km, trees (48%) and grassland (30%) within 16 km, and trees (55%) and water (28%) 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 Walnut Grove (49.1647°, -122.6404°, elevation 40 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.