Mandan in Fall
In fall (September, October and November), Mandan sees average daytime highs around 55°F and overnight lows near 35°F, with 4.4 in of precipitation over about 17 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 77°F in early September to 33°F by late November. The sky is clear or mostly clear about 38% of the time across fall, and the air most often feels dry.
Fall is Mandan's 2nd-best season to visit on our travel score. For the whole year in context, see Mandan's year-round climate.
- Avg daytime high
- 55°F
- 2nd-warmest season
- Avg overnight low
- 35°F
- Precipitation
- 4.4 in
- 17 wet days
- Avg wind
- 10 mph
- Travel score
- 3.8
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Mandan in Fall
Over the season highs ease from about 77°F in early September to 33°F by late November.
A typical fall day in Mandan reaches about 55°F and drops to 35°F overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Mandan
Once humidity and wind are folded in, fall brings about 0 days that feel above 90°F and 55 that feel at or below 32°F.
The story in fall is cold — wind chill drags the overnight "feels like" below the raw low.
Mandan weather by month
How the three fall months (September, October and November) 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 | 22° / 6° | 0.6 | 4.5 | 4.9 | 8.8 | 0.0 |
| Feb | 26° / 9° | 0.7 | 4.7 | 4.7 | 10 | 0.0 |
| Mar | 38° / 20° | 1.1 | 5.3 | 4.1 | 11.6 | 0.3 |
| Apr | 53° / 32° | 1.9 | 7.7 | 3 | 13.3 | 3.1 |
| May | 65° / 44° | 2.9 | 10.3 | 0.4 | 14.8 | 5.8 |
| Jun | 75° / 54° | 3.8 | 11.5 | 0 | 15.6 | 6.6 |
| Jul | 81° / 59° | 3.0 | 10 | 0 | 15.3 | 6.7 |
| Aug | 81° / 57° | 2.3 | 7.5 | 0 | 14 | 7.2 |
| Sep | 71° / 47° | 1.8 | 6.4 | 0 | 12.4 | 7.3 |
| Oct | 55° / 35° | 1.8 | 6.4 | 1.7 | 10.6 | 4.0 |
| Nov | 38° / 21° | 0.8 | 4.2 | 3.5 | 9.2 | 0.2 |
| Dec | 26° / 10° | 0.7 | 4.1 | 4.7 | 8.4 | 0.0 |
Cloud cover in Fall
The sky is clear or mostly clear about 38% of the time across fall.
Chance of precipitation in Fall
Mandan gets around 4.4 in of rain and snow over 17 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 10 mph across fall.
Sunrise & sunset in Fall
Daylight runs from about 13 h 12 min in early September to 8 h 36 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 3.0 kWh/m².
Hazard calendar for Mandan
In fall, Mandan overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Mandan's rainy season runs April–October, when most of the year's rain falls.
Is fall a good time to visit Mandan?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a weaker month for outdoor sightseeing in Mandan.
What to pack for Mandan in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Mandan sees daytime highs around 55°F and nights near 35°F. Pack a warm layer and a heavy coat. About 17 days see rain.
UV index in Mandan in Fall
Clear-sky midday UV across fall averages around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Mandan peaks around June 22 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. 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 | 8 | 8 | 6 | 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 | 8 | Very high |
| Jul | 8 | Very high |
| Aug | 6 | High |
| Sep | 5 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Where is Mandan?
Mandan sits at 46.8°N, 100.9°W, 1,647 ft above sea level, in United States. The nearest listed city is Bismarck, 5.0 mi away.
Topography around Mandan
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Mandan.
Within 2 miles, the terrain around Mandan has only modest variations in elevation — a maximum elevation change of 341 ft around an average of 1,709 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 499 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 899 ft.
The land around Mandan is covered by grassland (44%) and artificial surfaces (26%) within 2 miles, grassland (63%) and cropland (21%) within 10 miles, and grassland (63%) and cropland (33%) 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 Mandan (46.8267°, -100.8896°, elevation 1,647 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.