United States · 1991–2020

Best time to visit
Devizes.

September leads for comfortable weather in Devizes: typically 27.2°C by day, 11.3°C at night, with 49 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high27.2°C

Typical low11.3°C

Rain in September49 mm

Comfort

September

September · May · June

79climate match

Beach

August

August · June · September

66climate match

Outdoors

October

October · April · September

80climate match

The weakest month is January, scoring 5 against September’s 79 — days reach only 4.2°C, 20° below the 24°C the score treats as ideal, and nights drop to -9.5°C.

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

54.2° / -9.5°

Feb

56.3° / -8°

Mar

2912.7° / -3.3°

Apr

5118.2° / 2°

May

7423.7° / 8.5°

Jun

6830.4° / 14.7°

Jul

5033.4° / 17.9°

Aug

6131.8° / 16.6°

Sep

7927.2° / 11.3°

Oct

5819.4° / 3.4°

Nov

2511.4° / -3.4°

Dec

55° / -8.4°

Monthly climate evidence for Devizes — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	4.2°C	-9.5°C	10 mm	2.3	9 h 37	5	Strong coverage
February	6.3°C	-8°C	14 mm	2.7	10 h 37	5	Strong coverage
March	12.7°C	-3.3°C	33 mm	4.2	11 h 49	29	Strong coverage
April	18.2°C	2°C	61 mm	6.2	13 h 12	51	Strong coverage
May	23.7°C	8.5°C	93 mm	8.3	14 h 22	74	Strong coverage
June	30.4°C	14.7°C	81 mm	7.4	15 h	68	Strong coverage
July	33.4°C	17.9°C	106 mm	7.6	14 h 45	50	Strong coverage
August	31.8°C	16.6°C	83 mm	7.2	13 h 45	61	Strong coverage
September	27.2°C	11.3°C	49 mm	4.8	12 h 24	79	Strong coverage
October	19.4°C	3.4°C	62 mm	5.1	11 h 04	58	Strong coverage
November	11.4°C	-3.4°C	23 mm	2.7	9 h 55	25	Strong coverage
December	5°C	-8.4°C	14 mm	2.3	9 h 21	5	Strong coverage

What has changed

Devizes runs +1.1°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

+0.5

Feb

-0.8

Mar

+2.4

Apr

+0.6

May

+1.0

Jun

+3.1

Jul

+1.1

Aug

+0.8

Sep

+2.4

Oct

-0.3

Nov

+1.0

Dec

+0.8

September daytime highs, 2011–2025. Last recorded: 27.5°C.

Records at NORTON DAM, 1962–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	25.6°C11 Jan 1990	-29.4°C4 Jan 1974	18 mm27 Jan 1994	37 mm1992 · driest 0 mm in 2021	63
February	27.8°C18 Feb 1970	-32.2°C15 Feb 2021	41 mm5 Feb 2024	43 mm2024 · driest 0 mm in 2021	64
March	36.7°C22 Mar 2026	-25.0°C5 Mar 2019	53 mm22 Mar 1979	152 mm1973 · driest 0 mm in 2025	60
April	36.1°C25 Apr 2012	-15.0°C7 Apr 2018	70 mm23 Apr 2010	170 mm1984 · driest 0 mm in 2026	62
May	38.3°C15 May 2013	-4.4°C2 May 2005	80 mm14 May 1985	364 mm1995 · driest 0 mm in 2021	62
June	47.8°C28 Jun 2012	-2.2°C6 Jun 1998	109 mm24 Jun 1966	252 mm1967 · driest 10 mm in 2017	61
July	43.9°C7 Jul 1991	5.6°C30 Jul 1971	65 mm8 Jul 2012	280 mm1993 · driest 0 mm in 2021	59
August	42.8°C10 Aug 1964	6.1°C28 Aug 1976	84 mm7 Aug 2023	265 mm2011 · driest 0 mm in 2021	62
September	41.7°C8 Sep 2013	-6.7°C29 Sep 1984	114 mm22 Sep 1963	183 mm1976 · driest 1 mm in 2025	63
October	35.6°C12 Oct 2015	-14.4°C28 Oct 2020	137 mm8 Oct 2011	227 mm2008 · driest 0 mm in 2021	64
November	31.1°C7 Nov 1980	-21.7°C28 Nov 1976	64 mm17 Nov 2015	98 mm2015 · driest 0 mm in 2020	64
December	28.9°C24 Dec 1964	-33.3°C23 Dec 1989	52 mm31 Dec 2006	102 mm2006 · driest 0 mm in 2018	61

Typical days per month at NORTON DAM, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	31	<1	2
February	<1	0	27	<1	2
March	2	<1	24	1	1
April	6	1	10	2	<1
May	14	6	1	3	<1
June	26	17	<1	3	0
July	30	24	0	3	0
August	29	21	0	2	0
September	21	11	<1	2	0
October	8	2	8	2	<1
November	<1	0	24	<1	<1
December	0	0	30	<1	2

The best month has moved. On the 1961–1990 numbers the strongest month here was September (scoring 81); on 2011–2025 it is May (84). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in NORTON DAM’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	1%	6%	<1%	2%	-0.3–8.0°C
February	5%	8%	1%	2%	1.3–11.7°C
March	19%	14%	3%	11%	7.9–16.9°C
April	39%	21%	7%	20%	15.4–21.1°C
May	57%	28%	11%	32%	20.4–26.4°C
June	73%	26%	10%	25%	26.8–32.9°C
July	76%	24%	10%	26%	30.5–35.8°C
August	78%	21%	8%	17%	29.3–34.6°C
September	74%	18%	6%	12%	24.6–29.7°C
October	49%	14%	5%	10%	16.7–22.9°C
November	15%	9%	2%	5%	8.7–15.0°C
December	2%	8%	1%	3%	1.7–8.9°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.

1965Each stripe is one year’s mean temperature against the 53-year average. Warmest: 2012. Coolest: 1993.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5445310
NOAA station: USC00145852 · NORTON DAM
Station distance: 22.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 27 usable years
Daylight: Calculated from latitude 39.99°, 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 NORTON DAM is what differs

Norton→Norcatur→Clayton→Dellvale→Lyle→New Almelo→

Or put two places side by side: Devizes vs Norton

Best time to visitDevizes.