Jamestown in Summer
In summer (June, July and August), Jamestown sees average daytime highs around 77°F and overnight lows near 57°F, with 11.0 in of rain over about 30 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 71°F in early June to 76°F by late August. The sky is clear or mostly clear about 41% of the time across summer, and the air most often feels dry.
Summer is Jamestown's best season of the year to visit on our travel score. For the whole year in context, see Jamestown's year-round climate.
- Avg daytime high
- 77°F
- warmest season of the year
- Avg overnight low
- 57°F
- Rainfall
- 11.0 in
- 30 wet days
- Avg wind
- 9 mph
- Travel score
- 6.9
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Jamestown in Summer
Over the season highs climb from about 71°F in early June to 76°F by late August.
A typical summer day in Jamestown reaches about 77°F and drops to 57°F overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Jamestown
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.
Jamestown 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 | 18° / 2° | 0.7 | 4.7 | 5.2 | 8.8 | 0.0 |
| Feb | 22° / 6° | 0.7 | 4.8 | 4.9 | 10 | 0.0 |
| Mar | 34° / 18° | 1.2 | 5.8 | 4.1 | 11.6 | 0.0 |
| Apr | 51° / 31° | 1.8 | 7.8 | 2.7 | 13.3 | 2.6 |
| May | 65° / 44° | 3.2 | 10.8 | 0.4 | 14.8 | 5.7 |
| Jun | 74° / 55° | 4.5 | 11.6 | 0 | 15.6 | 6.5 |
| Jul | 79° / 59° | 3.6 | 9.7 | 0 | 15.3 | 7.0 |
| Aug | 78° / 56° | 2.9 | 8.5 | 0 | 14 | 7.3 |
| Sep | 69° / 47° | 2.5 | 7.4 | 0 | 12.4 | 6.9 |
| Oct | 54° / 35° | 2.1 | 6.9 | 1.3 | 10.6 | 3.5 |
| Nov | 37° / 20° | 1.0 | 4.9 | 4.1 | 9.2 | 0.1 |
| Dec | 23° / 8° | 0.9 | 5.1 | 5.4 | 8.4 | 0.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 41% of the time across summer.
Chance of precipitation in Summer
Jamestown gets around 11.0 in of rain over 30 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 9 mph across summer.
Sunrise & sunset in Summer
Daylight runs from about 15 h 24 min in early June to 13 h 12 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.
Hazard calendar for Jamestown
In summer, Jamestown overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Jamestown's rainy season runs May–October, when most of the year's rain falls.
Is summer a good time to visit Jamestown?
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 Jamestown for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Jamestown in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Jamestown sees daytime highs around 77°F and nights near 57°F. Pack sun protection. Worth having: light clothes and rain gear. About 30 days see rain.
UV index in Jamestown in Summer
Clear-sky midday UV across summer averages around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Jamestown peaks around June 19 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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) | 1 | 2 | 3 | 4 | 6 | 9 | 8 | 7 | 5 | 4 | 2 | 1 |
| Level | Low | Low | Moderate | Moderate | High | Very high | Very high | High | High | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Low |
| Mar | 3 | Moderate |
| Apr | 4 | Moderate |
| May | 6 | High |
| Jun | 9 | Very high |
| Jul | 8 | Very high |
| Aug | 7 | High |
| Sep | 5 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Air quality in Jamestown 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 Jamestown is worst in August — around 15 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (October, 5 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) | 8 | 9 | 12 | 11 | 10 | 9 | 14 | 15 | 10 | 5 | 7 | 8 |
| Level | Good | Good | Moderate | Good | Good | Good | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 9 | Good |
| Mar | 12 | Moderate |
| Apr | 11 | Good |
| May | 10 | Good |
| Jun | 9 | Good |
| Jul | 14 | Moderate |
| Aug | 15 | Moderate |
| Sep | 10 | Good |
| Oct | 5 | Good |
| Nov | 7 | Good |
| Dec | 8 | Good |
Where is Jamestown?
Jamestown sits at 46.9°N, 98.7°W, 1,407 ft above sea level, in United States. The nearest listed city is West Fargo, 85 mi away.
Topography around Jamestown
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Jamestown.
Within 2 miles, the terrain around Jamestown has only modest variations in elevation — a maximum elevation change of 141 ft around an average of 1,457 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 259 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,135 ft.
The land around Jamestown is covered by grassland (39%) and artificial surfaces (28%) within 2 miles, cropland (66%) and grassland (27%) within 10 miles, and cropland (64%) and grassland (30%) 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 Jamestown (46.9105°, -98.7084°, elevation 1,407 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.