Mandan weather in May

In May, Mandan sees average daytime highs of 65°F and overnight lows near 44°F, with 2.9 in of precipitation across 10.3 wet days and about 14.8 hours of daylight. It is the 5th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 60°F in the first days to 70°F by the end. The sky is clear or mostly clear about 29% of the time in May, and the air most often feels dry.

Daylight stretches from about 14 h 06 min at the start of May to 15 h 18 min by month's end. Set against the rest of the year, May is Mandan's 6th-clearest and 6th-windiest month. For the whole year in context, see Mandan's year-round climate.

Daytime high
65°
5th warmest
Overnight low
44°
8th coldest
Precipitation
2.9 in
10.3 wet days
Daylight
14 h 48 min
5:15 AM – 8:05 PM
Cloud cover
61%
6th clearest
Wind
10 mph
6th windiest
Solar energy
5.97 kWh/m²
Travel score
5.8
out of 10

Mandan is city in North Dakota, United States.

Density
737/km²
people per km²
Founded
1881

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 60°F in the first days to 70°F by the end.

A typical May day in Mandan reaches about 65°F in the afternoon and slips back to 44°F overnight — a 22°F spread between the day's warmth and the night's chill. On most days the high lands between 52°F and 79°F. Set against its neighbours, May runs about 13°F warmer than April and about 9°F cooler than June.

20°40°60°80°151015202531
Avg high (°F)Avg low (°F)
16038
26038
36038
46139
56139
66240
76240
86240
96341
106341
116442
126442
136543
146543
156543
166644
176644
186745
196745
206746
216846
226846
236847
246947
256948
266948
276948
287049
297049
307050
317150

How May really feels in Mandan

Once humidity and wind are folded in, May averages 0 days that feel above 90°F and 3 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
3
wind chill below the day's low

The story in May is cold — wind chill drags the overnight "feels like" below the raw low.

Mandan weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan22° / 0.64.54.98.80.0
Feb26° / 0.74.74.7100.0
Mar38° / 20°1.15.34.111.60.3
Apr53° / 32°1.97.7313.33.1
May65° / 44°2.910.30.414.85.8
Jun75° / 54°3.811.5015.66.6
Jul81° / 59°3.010015.36.7
Aug81° / 57°2.37.50147.2
Sep71° / 47°1.86.4012.47.3
Oct55° / 35°1.86.41.710.64.0
Nov38° / 21°0.84.23.59.20.2
Dec26° / 10°0.74.14.78.40.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 17% of May, with mostly cloudy or overcast conditions the remaining 54%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14456
24456
34357
44456
54456
64456
74456
84654
94654
104654
114654
124654
134654
144654
154753
164753
174753
184753
194753
204753
214753
224654
234753
244753
254654
264555
274654
284753
294753
304753
314753

Chance of precipitation in May

Any precipitationSnow

Mandan gets around 2.9 in of rain and snow over 10.3 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 34% and peaks near 38% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1324
2334
3334
4333
5333
6333
7333
8333
9332
10332
11332
12332
13332
14332
15322
16321
17321
18321
19321
20321
21321
22331
23331
24341
25350
26350
27360
28370
29370
30370
31380

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

Most of May feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, May lands in the dry band about 93% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19910
29910
39910
49910
59910
69820
79820
89820
99820
109730
119730
129640
139640
149550
159550
169460
179361
189361
199271
209271
219181
229181
239091
249091
2589101
2689101
2787112
2887112
2986122
3085132
3185132

Wind in May

Winds average 10 mph in May.

Across May, daily wind ranges from about 9 mph on the calmest days to 10 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
110light breeze
210light breeze
310light breeze
410light breeze
510light breeze
610light breeze
710light breeze
810light breeze
910light breeze
1010light breeze
1110light breeze
1210light breeze
1310light breeze
1410light breeze
1510light breeze
1610light breeze
1710light breeze
1810light breeze
1910light breeze
2010light breeze
2110light breeze
2210light breeze
2310light breeze
2410light breeze
2510light breeze
2610light breeze
2710light breeze
2810light breeze
2910light breeze
309light breeze
319light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 14 h 06 min at the start of May to 15 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 72 minutes over May. Sunrise moves from 5:37 AM to 5:01 AM, and sunset from 7:45 PM to 8:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.15:377:45
214.25:357:46
314.25:347:47
414.35:327:49
514.35:307:50
614.45:297:52
714.45:277:53
814.55:267:54
914.55:247:56
1014.65:237:57
1114.65:227:58
1214.75:207:59
1314.75:198:01
1414.75:188:02
1514.85:168:03
1614.85:158:05
1714.95:148:06
1814.95:138:07
1914.95:128:08
2015.05:108:09
2115.05:098:11
2215.15:088:12
2315.15:078:13
2415.15:068:14
2515.25:058:15
2615.25:048:16
2715.25:048:17
2815.35:038:18
2915.35:028:19
3015.35:018:20
3115.35:018:21

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.97 kWh/m².

For context, solar energy here swings from a low near 1.44 kWh/m² to a high of 6.72 kWh/m² in July across the year — May's 5.97 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.8Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.9Bright
115.9Bright
125.9Bright
136.0Bright
146.0Bright
156.0Intense
166.0Intense
176.0Intense
186.0Intense
196.0Intense
206.0Intense
216.0Intense
226.0Intense
236.0Intense
246.0Intense
256.0Intense
266.0Intense
276.0Intense
286.0Intense
296.1Intense
306.1Intense
316.1Intense
Planning a trip in May

Hazard calendar for Mandan

In seasonPeak

In May, Mandan sits inside 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.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Mandan?

Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.8
Sightseeing
5th-best month of the year
2.3
Beach & pool
5th-best month of the year

May is a reasonable time to visit Mandan for sightseeing.

What to pack for Mandan in May

From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In May, Mandan sees daytime highs around 65°F and nights near 44°F. Worth packing: a warm layer, rain gear and sun protection. About 10 days see rain.

a warm layerrain gearsun protection

UV index in Mandan in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 6 — 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 22UV 8Dec 20UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr4Moderate
May6High
Jun8Very high
Jul8Very high
Aug6High
Sep5High
Oct4Moderate
Nov2Low
Dec1Low
Location & terrain

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.

2 miles
341 ft
10 miles
499 ft
50 miles
899 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Bismarck 5.0 mi · Dickinson 90 mi · Minot 99 mi · Jamestown 103 mi · Aberdeen 149 mi · Williston 157 mi · West Fargo 188 mi · Fargo 194 mi

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
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).