United States · 1991–2020

Best time to visit
Butte.

August leads for comfortable weather in Butte: typically 26.7°C by day, 6.5°C at night, with 30 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortAugust

Typical high26.7°C

Typical low6.5°C

Rain in August30 mm

Comfort

August

August · July · September

74climate match

Beach

July

July · August · September

55climate match

Outdoors

September

September · June · August

83climate match

The weakest month is January, scoring 5 against August’s 74 — days reach only 0°C, 24° below the 24°C the score treats as ideal, and nights drop to -13.5°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

50° / -13.5°

Feb

51.7° / -12.3°

Mar

56.7° / -7°

Apr

2010.7° / -3.1°

May

4216.1° / 1.3°

Jun

6321.2° / 5.1°

Jul

7327.4° / 7.7°

Aug

7426.7° / 6.5°

Sep

6520.7° / 2.4°

Oct

2712.3° / -2.9°

Nov

54.6° / -9°

Dec

5-0.7° / -13.9°

Monthly climate evidence for Butte — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	0°C	-13.5°C	11 mm	3.1	9 h 01	5	Strong coverage
February	1.7°C	-12.3°C	11 mm	3.6	10 h 16	5	Strong coverage
March	6.7°C	-7°C	17 mm	5	11 h 45	5	Strong coverage
April	10.7°C	-3.1°C	33 mm	7.3	13 h 28	20	Strong coverage
May	16.1°C	1.3°C	52 mm	9	14 h 55	42	Strong coverage
June	21.2°C	5.1°C	63 mm	9.8	15 h 44	63	Strong coverage
July	27.4°C	7.7°C	31 mm	5.9	15 h 24	73	Strong coverage
August	26.7°C	6.5°C	30 mm	5.4	14 h 09	74	Strong coverage
September	20.7°C	2.4°C	27 mm	4.8	12 h 29	65	Strong coverage
October	12.3°C	-2.9°C	22 mm	4.9	10 h 50	27	Strong coverage
November	4.6°C	-9°C	15 mm	4.3	9 h 23	5	Strong coverage
December	-0.7°C	-13.9°C	12 mm	3.6	8 h 40	5	Strong coverage

What has changed

Butte runs +1.0°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

+1.9

Feb

-0.6

Mar

+2.0

Apr

+0.3

May

+0.1

Jun

+1.0

Jul

+1.6

Aug

+1.1

Sep

+2.3

Oct

-0.5

Nov

+1.1

Dec

+1.9

August daytime highs, 2011–2025. Last recorded: 26.1°C.

Records at BUTTE BERT MOONEY AP, 1894–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	14.4°C29 Jan 1931	-44.4°C7 Jan 1937	25 mm28 Jan 1899	60 mm1899 · driest 0 mm in 1902	130
February	16.1°C24 Feb 1921	-46.7°C9 Feb 1933	23 mm12 Feb 1904	74 mm1904 · driest 1 mm in 2022	130
March	21.1°C20 Mar 2026	-37.8°C10 Mar 1948	31 mm8 Mar 1918	80 mm1918 · driest 2 mm in 1959	129
April	28.3°C25 Apr 1910	-26.7°C8 Apr 1982	28 mm22 Apr 1899	80 mm2006 · driest 3 mm in 1974	130
May	32.2°C28 May 1919	-12.8°C8 May 1965	64 mm28 May 1927	148 mm1927 · driest 2 mm in 1934	129
June	36.1°C26 Jun 1919	-5.6°C6 Jun 1916	76 mm9 Jun 1913	225 mm1913 · driest 7 mm in 1974	130
July	37.8°C22 Jul 1931	-2.2°C7 Jul 1971	34 mm31 Jul 1937	111 mm1937 · driest 1 mm in 1953	130
August	37.2°C12 Aug 1940	-5.0°C25 Aug 1992	51 mm2 Aug 1943	84 mm1922 · driest 0 mm in 1955	130
September	35.6°C3 Sep 2022	-16.1°C24 Sep 1926	37 mm17 Sep 1908	90 mm1947 · driest 0 mm in 1935	130
October	29.4°C3 Oct 2010	-30.6°C30 Oct 1991	58 mm10 Oct 1911	84 mm1911 · driest 0 mm in 1987	129
November	21.1°C12 Nov 1999	-41.1°C13 Nov 1959	31 mm20 Nov 1921	76 mm1921 · driest 0 mm in 1901	129
December	18.9°C27 Dec 1917	-46.7°C23 Dec 1983	33 mm11 Dec 1919	51 mm1996 · driest 1 mm in 1918	129

Typical days per month at BUTTE BERT MOONEY AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	30	0	9
February	0	0	28	0	9
March	0	0	30	<1	9
April	<1	0	25	<1	9
May	3	<1	12	1	3
June	9	2	2	2	<1
July	24	10	<1	<1	0
August	22	8	<1	<1	<1
September	9	1	9	<1	<1
October	<1	0	24	<1	5
November	0	0	29	<1	9
December	0	0	30	<1	9

How often, not how much — every day in BUTTE BERT MOONEY 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%	14%	<1%	10%	-4.9–2.2°C
February	0%	14%	<1%	10%	-2.3–4.8°C
March	<1%	18%	<1%	14%	1.6–8.7°C
April	7%	20%	2%	18%	7.8–14.0°C
May	25%	28%	4%	34%	13.0–18.9°C
June	49%	30%	6%	36%	18.0–23.9°C
July	77%	19%	2%	17%	23.8–29.5°C
August	77%	17%	3%	15%	23.2–28.4°C
September	51%	17%	3%	14%	16.4–23.3°C
October	16%	14%	1%	10%	9.7–16.2°C
November	<1%	14%	<1%	11%	1.5–8.3°C
December	0%	13%	<1%	9%	-3.2–3.4°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.

1895Each stripe is one year’s mean temperature against the 123-year average. Warmest: 1925. Coolest: 1975.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5642934
NOAA station: USW00024135 · BUTTE BERT MOONEY AP
Station distance: 5.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 46.00°, 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 BUTTE BERT MOONEY AP is what differs

Whitehall→Walkerville→AA Westside Mobile Estates→Allendale (historical)→Anselmo (historical)→Burlington (historical)→

Or put two places side by side: Butte vs Whitehall

Best time to visitButte.