Buffalo Grove in Summer
In summer (June, July and August), Buffalo Grove sees average daytime highs around 78°F and overnight lows near 65°F, with 10.5 in of rain over about 33 wet days across the season. It is the warmest season of the year and the 2nd-wettest season.
Over the season highs climb from about 71°F in early June to 78°F by late August. The sky is clear or mostly clear about 34% of the time across summer, and the air most often feels muggy.
Summer is Buffalo Grove's best season of the year to visit on our travel score. For the whole year in context, see Buffalo Grove's year-round climate.
- Avg daytime high
- 78°F
- warmest season of the year
- Avg overnight low
- 65°F
- Rainfall
- 10.5 in
- 33 wet days
- Avg wind
- 8 mph
- Travel score
- 6.5
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Buffalo Grove in Summer
Over the season highs climb from about 71°F in early June to 78°F by late August.
A typical summer day in Buffalo Grove reaches about 78°F and drops to 65°F overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Buffalo Grove
Once humidity and wind are folded in, summer brings about 0 days that feel above 90°F and 0 that feel at or below 32°F.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Buffalo 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 (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 30° / 19° | 2.3 | 9.1 | 6.4 | 9.3 | 0.0 |
| Feb | 33° / 20° | 2.0 | 7.2 | 5.3 | 10.3 | 0.0 |
| Mar | 42° / 29° | 2.6 | 9.7 | 3.2 | 11.6 | 0.6 |
| Apr | 53° / 40° | 4.4 | 12.2 | 1.2 | 13.1 | 2.9 |
| May | 64° / 51° | 4.1 | 12.3 | 0 | 14.4 | 5.3 |
| Jun | 76° / 62° | 3.6 | 11.4 | 0 | 15 | 6.5 |
| Jul | 80° / 67° | 3.3 | 10.8 | 0 | 14.8 | 6.4 |
| Aug | 79° / 66° | 3.6 | 10.7 | 0 | 13.7 | 6.7 |
| Sep | 72° / 58° | 2.9 | 9 | 0 | 12.3 | 6.9 |
| Oct | 60° / 46° | 3.3 | 9.5 | 0.1 | 10.8 | 4.8 |
| Nov | 46° / 35° | 2.6 | 8.5 | 1.4 | 9.6 | 1.4 |
| Dec | 35° / 25° | 2.4 | 8.8 | 4.5 | 9 | 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
Buffalo Grove gets around 10.5 in 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 muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 8 mph across summer.
Sunrise & sunset in Summer
Daylight runs from about 14 h 48 min in early June to 13 hours 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 Buffalo 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 Buffalo Grove for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Buffalo Grove in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Buffalo Grove sees daytime highs around 78°F and nights near 65°F. Pack sun protection. Worth having: light clothes and rain gear. About 33 days see rain.
Sea temperature near Buffalo Grove in Summer
The nearest coast averages about 65°F 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 16 mi away) is warmest in August at about 71°F and coldest in March near 36°F.
It's comfortable for a long swim from Jul 18 to Sep 8 — about 1.7 months when the water holds above 68°F.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 38 | 36 | 36 | 38 | 43 | 55 | 68 | 71 | 67 | 57 | 47 | 42 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Refreshing | Refreshing | Cool | Bracing | Bracing | Bracing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 38 | Bracing |
| Feb | 36 | Bracing |
| Mar | 36 | Bracing |
| Apr | 38 | Bracing |
| May | 43 | Bracing |
| Jun | 55 | Bracing |
| Jul | 68 | Refreshing |
| Aug | 71 | Refreshing |
| Sep | 67 | Cool |
| Oct | 57 | Bracing |
| Nov | 47 | Bracing |
| Dec | 42 | Bracing |
UV index in Buffalo Grove 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 Buffalo Grove peaks around June 23 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (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 | 3 | 4 | 6 | 7 | 9 | 9 | 8 | 6 | 3 | 2 | 2 |
| Level | Low | Moderate | Moderate | High | Very high | Very high | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 4 | Moderate |
| Apr | 6 | High |
| May | 7 | Very high |
| Jun | 9 | Very high |
| Jul | 9 | Very high |
| Aug | 8 | Very high |
| Sep | 6 | High |
| Oct | 3 | Moderate |
| Nov | 2 | Moderate |
| Dec | 2 | Low |
Air quality in Buffalo 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 Buffalo Grove is worst in July — around 21 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 10 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 | 15 | 18 | 19 | 20 | 21 | 21 | 18 | 15 | 10 | 10 | 11 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 12 | Moderate |
| Feb | 15 | Moderate |
| Mar | 18 | Moderate |
| Apr | 19 | Moderate |
| May | 20 | Moderate |
| Jun | 21 | Moderate |
| Jul | 21 | Moderate |
| Aug | 18 | Moderate |
| Sep | 15 | Moderate |
| Oct | 10 | Good |
| Nov | 10 | Good |
| Dec | 11 | Good |
Where is Buffalo Grove?
Buffalo Grove sits at 42.2°N, 88.0°W, 679 ft above sea level, in United States. The nearest listed city is Wheeling, 1.9 mi away.
Topography around Buffalo Grove
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Buffalo Grove.
Within 2 miles, the terrain around Buffalo Grove has only modest variations in elevation — a maximum elevation change of 151 ft around an average of 689 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 374 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 892 ft.
The land around Buffalo Grove is covered by artificial surfaces (49%) and trees (31%) within 2 miles, trees (46%) and artificial surfaces (30%) within 10 miles, and water (33%) and cropland (24%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- 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 Buffalo Grove (42.1514°, -87.9598°, elevation 679 ft), 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.