United States · 1991–2020

Best time to visit
Sunny.

June leads for comfortable weather in Sunny: typically 24.4°C by day, 11.6°C at night, with 89 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJune

Typical high24.4°C

Typical low11.6°C

Rain in June89 mm

Comfort

June

June · August · September

80climate match

Beach

August

August · July · June

67climate match

Outdoors

September

September · May · June

85climate match

The weakest month is January, scoring 5 against June’s 80 — days reach only -5.2°C, 29° below the 24°C the score treats as ideal.

Month by month

The whole year,
without the guesswork.

The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.

Jan

5-5.2° / -16.3°

Feb

5-2.5° / -14°

Mar

54.1° / -7.7°

Apr

3112.3° / -0.8°

May

5819.2° / 5.9°

Jun

8024.4° / 11.6°

Jul

7528.1° / 14.5°

Aug

7927.7° / 13.1°

Sep

7822.3° / 7.6°

Oct

3613.4° / 0°

Nov

54.4° / -7.1°

Dec

5-2.9° / -13.3°

Monthly climate evidence for Sunny — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-5.2°C	-16.3°C	9 mm	2.9	8 h 55	5	Strong coverage
February	-2.5°C	-14°C	9 mm	2.6	10 h 13	5	Strong coverage
March	4.1°C	-7.7°C	14 mm	3.1	11 h 45	5	Strong coverage
April	12.3°C	-0.8°C	29 mm	5	13 h 31	31	Strong coverage
May	19.2°C	5.9°C	68 mm	8	15 h 01	58	Strong coverage
June	24.4°C	11.6°C	89 mm	8.7	15 h 51	80	Strong coverage
July	28.1°C	14.5°C	81 mm	7.4	15 h 31	75	Strong coverage
August	27.7°C	13.1°C	57 mm	5.5	14 h 12	79	Strong coverage
September	22.3°C	7.6°C	44 mm	4.8	12 h 30	78	Strong coverage
October	13.4°C	0°C	37 mm	4.7	10 h 48	36	Strong coverage
November	4.4°C	-7.1°C	14 mm	2.3	9 h 18	5	Strong coverage
December	-2.9°C	-13.3°C	11 mm	2.9	8 h 33	5	Strong coverage

What has changed

Sunny runs +0.4°C
on the 1961–1990 baseline.

Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.

Jan

+2.4

Feb

+0.3

Mar

+1.1

Apr

-0.7

May

-0.1

Jun

+0.1

Jul

-0.2

Aug

-0.7

Sep

+2.0

Oct

-1.0

Nov

+0.7

Dec

+1.5

June daytime highs, 2011–2025. Last recorded: 24.0°C.

Records at MANDAN EXP STN, 1913–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	17.2°C24 Jan 1981	-41.7°C14 Jan 1916	17 mm16 Jan 1933	32 mm1943 · driest 0 mm in 2023	112
February	20.0°C26 Feb 1958	-43.3°C16 Feb 1936	29 mm26 Feb 2000	47 mm1922 · driest 0 mm in 2016	111
March	27.8°C30 Mar 1967	-34.4°C1 Mar 1962	27 mm24 Mar 1950	72 mm1950 · driest 0 mm in 2013	111
April	34.4°C22 Apr 1980	-22.2°C1 Apr 1975	50 mm29 Apr 1940	162 mm1975 · driest 0 mm in 1952	111
May	38.9°C30 May 1934	-10.6°C3 May 1967	73 mm12 May 1985	187 mm2013 · driest 1 mm in 1936	113
June	43.3°C30 Jun 2002	-2.2°C2 Jun 1969	112 mm16 Jun 2009	271 mm1914 · driest 11 mm in 1936	111
July	46.1°C6 Jul 1936	2.2°C4 Jul 1972	113 mm27 Jul 2001	341 mm1993 · driest 0 mm in 1936	113
August	42.8°C5 Aug 1941	0.0°C28 Aug 1935	74 mm1 Aug 1915	155 mm1951 · driest 3 mm in 2001	113
September	40.0°C9 Sep 1959	-10.0°C30 Sep 1974	76 mm18 Sep 1977	148 mm2019 · driest 0 mm in 1948	111
October	35.6°C5 Oct 1963	-25.6°C26 Oct 1919	51 mm5 Oct 1998	148 mm1994 · driest 0 mm in 1935	110
November	26.7°C8 Nov 1999	-32.2°C24 Nov 1985	37 mm6 Nov 2008	94 mm2008 · driest 0 mm in 2009	111
December	18.9°C5 Dec 1979	-43.3°C28 Dec 1916	27 mm28 Dec 2016	46 mm2008 · driest 0 mm in 2021	109

Typical days per month at MANDAN EXP STN, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	30	0	3
February	0	0	27	<1	3
March	<1	0	28	<1	2
April	1	<1	17	<1	1
May	6	1	4	2	<1
June	15	4	0	3	0
July	25	11	0	3	0
August	23	10	0	2	0
September	11	4	2	1	0
October	2	<1	16	1	<1
November	<1	0	28	<1	2
December	0	0	31	<1	3

How often, not how much — every day in MANDAN EXP STN’s record sorted by what it was actually like, rather than averaged
Month	Warm & dry days	Wet days	Washouts	Week with 3+ wet days	Daytime mean has ranged
January	0%	9%	<1%	4%	-13.0–0.0°C
February	0%	9%	<1%	4%	-9.2–2.6°C
March	2%	11%	1%	6%	-1.7–8.3°C
April	17%	17%	4%	15%	8.9–16.1°C
May	43%	24%	6%	26%	16.9–22.9°C
June	62%	28%	9%	33%	22.0–26.9°C
July	77%	22%	7%	20%	26.3–31.2°C
August	80%	18%	5%	13%	25.4–30.7°C
September	57%	16%	4%	12%	19.5–25.1°C
October	25%	12%	3%	8%	10.5–17.8°C
November	2%	9%	1%	4%	0.0–8.5°C
December	0%	9%	<1%	4%	-8.2–1.9°C

A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.

1916Each stripe is one year’s mean temperature against the 102-year average. Warmest: 1931. Coolest: 1950.2024

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5692455
NOAA station: USC00325479 · MANDAN EXP STN
Station distance: 4.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 28 usable years
Daylight: Calculated from latitude 46.83°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Important limit: Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.

These places read the same station, so their numbers are identical — distance from MANDAN EXP STN is what differs

Mandan→Harmon→Double Ditch Indian Village→Lyons→Rock Haven→Sweet Briar→

Or put two places side by side: Sunny vs Mandan

Best time to visitSunny.