United States · 1991–2020

Best time to visit
Promise.

September leads for comfortable weather in Promise: typically 24.3°C by day, 9.6°C at night, with 40 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high24.3°C

Typical low9.6°C

Rain in September40 mm

Comfort

September

September · June · August

87climate match

Beach

July

July · August · June

75climate match

Outdoors

September

September · May · October

83climate match

The weakest month is January, scoring 5 against September’s 87 — days reach only -2.8°C, 27° 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

5-2.8° / -14.1°

Feb

5-1.1° / -12.7°

Mar

56.4° / -6.1°

Apr

3814.5° / 0.2°

May

6320.5° / 6.6°

Jun

7826.1° / 12.6°

Jul

7030.7° / 16.2°

Aug

7629.5° / 14.7°

Sep

8724.3° / 9.6°

Oct

4314.8° / 1.9°

Nov

87° / -5.2°

Dec

5-0.9° / -11.7°

Monthly climate evidence for Promise — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-2.8°C	-14.1°C	7 mm	2.2	9 h 05	5	Good coverage
February	-1.1°C	-12.7°C	14 mm	3.7	10 h 19	5	Good coverage
March	6.4°C	-6.1°C	19 mm	3.5	11 h 46	5	Good coverage
April	14.5°C	0.2°C	41 mm	5.8	13 h 26	38	Good coverage
May	20.5°C	6.6°C	79 mm	8	14 h 51	63	Good coverage
June	26.1°C	12.6°C	73 mm	8.5	15 h 38	78	Good coverage
July	30.7°C	16.2°C	54 mm	6	15 h 20	70	Good coverage
August	29.5°C	14.7°C	56 mm	5.6	14 h 06	76	Good coverage
September	24.3°C	9.6°C	40 mm	4.6	12 h 28	87	Good coverage
October	14.8°C	1.9°C	42 mm	5.3	10 h 52	43	Good coverage
November	7°C	-5.2°C	9 mm	2	9 h 27	8	Good coverage
December	-0.9°C	-11.7°C	12 mm	2.7	8 h 45	5	Good coverage

Records at MOBRIDGE MUNI AP, 1998–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	17.8°C8 Jan 2002	-36.0°C15 Jan 2009	7 mm11 Jan 2013	16 mm2019 · driest 1 mm in 2002	29
February	22.8°C27 Feb 2016	-34.3°C18 Feb 2025	24 mm15 Feb 2009	49 mm2009 · driest 1 mm in 2002	29
March	28.3°C16 Mar 2012	-29.4°C11 Mar 1998	43 mm8 Mar 2000	68 mm2007 · driest 2 mm in 2021	29
April	33.9°C13 Apr 2003	-17.1°C4 Apr 2018	34 mm18 Apr 2016	117 mm2016 · driest 11 mm in 2004	29
May	36.7°C26 May 2006	-9.4°C3 May 2005	82 mm17 May 2015	237 mm2015 · driest 8 mm in 2006	29
June	42.8°C29 Jun 2002	2.2°C3 Jun 1998	88 mm18 Jun 2014	201 mm2014 · driest 10 mm in 2021	29
July	46.7°C15 Jul 2006	6.7°C29 Jul 2004	65 mm30 Jul 2026	143 mm2001 · driest 10 mm in 1998	29
August	42.2°C23 Aug 2003	1.7°C19 Aug 2004	113 mm17 Aug 2007	158 mm2007 · driest 8 mm in 2003	28
September	38.9°C7 Sep 2002	-3.9°C24 Sep 2000	56 mm13 Sep 2025	165 mm2025 · driest 0 mm in 2024	28
October	34.4°C10 Oct 2015	-18.2°C26 Oct 2020	62 mm4 Oct 2013	145 mm2013 · driest 2 mm in 2024	28
November	26.7°C2 Nov 2022	-23.3°C24 Nov 2003	21 mm5 Nov 2008	34 mm2019 · driest 0 mm in 2020	28
December	21.7°C1 Dec 2021	-34.3°C31 Dec 2017	39 mm25 Dec 2016	59 mm2016 · driest 0 mm in 2001	28

Typical days per month at MOBRIDGE MUNI AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	31	0	5
February	0	0	28	<1	5
March	<1	0	27	<1	3
April	3	<1	15	1	2
May	8	2	3	3	0
June	19	7	0	2	0
July	28	18	0	2	0
August	26	15	0	2	0
September	15	6	<1	1	0
October	3	<1	11	1	<1
November	<1	0	26	<1	2
December	0	0	31	<1	4

How often, not how much — every day in MOBRIDGE MUNI AP’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%	8%	0%	3%	-5.7–0.8°C
February	<1%	12%	<1%	8%	-6.6–5.0°C
March	7%	11%	1%	7%	0.3–12.6°C
April	23%	19%	5%	15%	10.9–16.8°C
May	47%	25%	9%	27%	18.3–22.9°C
June	67%	28%	7%	32%	23.5–29.8°C
July	80%	20%	6%	15%	28.8–33.5°C
August	82%	17%	6%	14%	26.6–31.6°C
September	72%	15%	5%	11%	22.3–27.5°C
October	27%	16%	3%	12%	11.4–18.5°C
November	4%	7%	<1%	3%	2.4–11.4°C
December	<1%	10%	<1%	5%	-5.9–3.8°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.

1998Each stripe is one year’s mean temperature against the 28-year average. Warmest: 2016. Coolest: 2009.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5768120
NOAA station: USW00094052 · MOBRIDGE MUNI AP
Station distance: 28.5 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 22 usable years
Daylight: Calculated from latitude 45.33°, 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 MOBRIDGE MUNI AP is what differs

Mobridge→Glenham→Moreau→Virginia→

Or put two places side by side: Promise vs Mobridge

Best time to visitPromise.

September

July

September

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Promise.

The whole year,
without the guesswork.

Nearby, measured,
and named.