United States · 1991–2020

Best time to visit
Delle.

September leads for comfortable weather in Delle: typically 26.3°C by day, 10.3°C at night, with 21 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high26.3°C

Typical low10.3°C

Rain in September21 mm

Comfort

September

September · June · May

83climate match

Beach

June

June · July · August

77climate match

Outdoors

May

May · October · September

86climate match

The weakest month is January, scoring 5 against September’s 83 — days reach only 2.6°C, 21° 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

52.6° / -7.1°

Feb

56° / -5°

Mar

2911.9° / -0.9°

Apr

4816.2° / 2.2°

May

7521.7° / 7.2°

Jun

8128.7° / 13°

Jul

6134.1° / 18.1°

Aug

6932.5° / 16.4°

Sep

8326.3° / 10.3°

Oct

5817.9° / 3.7°

Nov

2210° / -2.1°

Dec

53.3° / -6.7°

Monthly climate evidence for Delle — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	2.6°C	-7.1°C	22 mm	5.3	9 h 33	5	Good coverage
February	6°C	-5°C	23 mm	5	10 h 35	5	Good coverage
March	11.9°C	-0.9°C	28 mm	5.5	11 h 49	29	Good coverage
April	16.2°C	2.2°C	36 mm	6.2	13 h 14	48	Good coverage
May	21.7°C	7.2°C	39 mm	6	14 h 26	75	Good coverage
June	28.7°C	13°C	19 mm	3	15 h 05	81	Good coverage
July	34.1°C	18.1°C	16 mm	3	14 h 49	61	Good coverage
August	32.5°C	16.4°C	16 mm	3.1	13 h 48	69	Good coverage
September	26.3°C	10.3°C	21 mm	3.8	12 h 25	83	Good coverage
October	17.9°C	3.7°C	26 mm	4.2	11 h 03	58	Good coverage
November	10°C	-2.1°C	24 mm	4.4	9 h 51	22	Good coverage
December	3.3°C	-6.7°C	21 mm	5.2	9 h 16	5	Good coverage

Records at GRANTSVILLE 2W, 1913–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	16.1°C17 Jan 2000	-22.8°C6 Jan 2017	24 mm26 Jan 1914	58 mm1914 · driest 1 mm in 2022	29
February	20.6°C8 Feb 2015	-16.7°C9 Feb 2001	20 mm11 Feb 2017	46 mm2017 · driest 1 mm in 2002	27
March	28.3°C23 Mar 2026	-14.4°C7 Mar 2012	19 mm29 Mar 2016	55 mm2019 · driest 9 mm in 2015	27
April	31.7°C30 Apr 2007	-7.2°C3 Apr 2018	28 mm26 Apr 2015	85 mm2011 · driest 3 mm in 2020	27
May	37.8°C30 May 2003	-4.4°C8 May 2002	39 mm29 May 2011	139 mm2011 · driest 1 mm in 2001	27
June	41.1°C16 Jun 2021	0.6°C10 Jun 2002	28 mm25 Jun 2021	86 mm2009 · driest 0 mm in 2025	26
July	41.1°C16 Jul 2003	3.9°C10 Jul 2016	19 mm26 Jul 2007	39 mm2001 · driest 0 mm in 2016	25
August	39.4°C14 Aug 2007	6.7°C17 Aug 2015	41 mm1 Aug 2023	116 mm2023 · driest 0 mm in 2008	27
September	38.9°C8 Sep 2022	-2.8°C10 Sep 2016	29 mm17 Sep 2015	54 mm2013 · driest 0 mm in 2018	26
October	32.8°C5 Oct 2024	-14.4°C30 Oct 2019	27 mm20 Oct 2009	75 mm2004 · driest 0 mm in 2017	26
November	25.0°C8 Nov 1999	-18.9°C24 Nov 2010	27 mm28 Nov 2019	41 mm2010 · driest 3 mm in 1999	27
December	20.0°C20 Dec 2025	-21.7°C9 Dec 2013	24 mm26 Dec 2003	75 mm2010 · driest 4 mm in 2023	29

Typical days per month at GRANTSVILLE 2W, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	29	<1	4
February	0	0	25	<1	4
March	<1	0	20	<1	3
April	2	<1	9	1	1
May	10	3	1	1	0
June	23	15	0	<1	0
July	30	28	0	<1	0
August	30	26	0	<1	0
September	20	8	<1	<1	0
October	4	<1	6	<1	<1
November	0	0	21	<1	2
December	0	0	28	<1	6

How often, not how much — every day in GRANTSVILLE 2W’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%	16%	1%	9%	-0.3–5.6°C
February	<1%	17%	1%	13%	2.4–8.9°C
March	8%	20%	2%	16%	9.7–14.3°C
April	27%	21%	4%	16%	14.1–17.6°C
May	57%	19%	3%	18%	19.1–24.4°C
June	88%	12%	2%	9%	25.9–31.1°C
July	92%	10%	1%	7%	33.2–35.9°C
August	89%	12%	2%	7%	30.8–33.6°C
September	81%	13%	2%	10%	24.4–28.6°C
October	35%	15%	3%	11%	15.5–20.6°C
November	4%	16%	2%	10%	7.9–12.2°C
December	<1%	16%	1%	10%	1.3–6.0°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.

2000Each stripe is one year’s mean temperature against the 22-year average. Warmest: 2025. Coolest: 2013.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5773799
NOAA station: USC00423348 · GRANTSVILLE 2W
Station distance: 28.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 20 usable years
Daylight: Calculated from latitude 40.76°, 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 GRANTSVILLE 2W is what differs

Grantsville→Burmester→Dolomite→Flux→Iosepa (historical)→Marshall→

Or put two places side by side: Delle vs Grantsville

Best time to visitDelle.

September

June

May

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Delle.

The whole year,
without the guesswork.

Nearby, measured,
and named.