United States · 1991–2020

Best time to visit
Altamont.

September leads for comfortable weather in Altamont: typically 26.1°C by day, 12.9°C at night, with 109 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high26.1°C

Typical low12.9°C

Rain in September109 mm

Comfort

September

September · May · June

75climate match

Beach

August

August · July · June

66climate match

Outdoors

October

October · April · May

76climate match

The weakest month is January, scoring 5 against September’s 75 — days reach only 7.3°C, 17° below the 24°C the score treats as ideal, and nights drop to -3.8°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

57.3° / -3.8°

Feb

59.4° / -2.2°

Mar

2314.5° / 1.9°

Apr

4419.5° / 6°

May

7023.5° / 11.2°

Jun

7027.2° / 15.5°

Jul

5528.7° / 17.4°

Aug

6528.7° / 16.7°

Sep

7526.1° / 12.9°

Oct

6020.4° / 6.5°

Nov

2814.7° / 1.3°

Dec

59.2° / -1.9°

Monthly climate evidence for Altamont — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	7.3°C	-3.8°C	137 mm	9.6	10 h 00	5	Good coverage
February	9.4°C	-2.2°C	147 mm	10.7	10 h 51	5	Good coverage
March	14.5°C	1.9°C	145 mm	10.9	11 h 52	23	Good coverage
April	19.5°C	6°C	168 mm	10	13 h 02	44	Good coverage
May	23.5°C	11.2°C	135 mm	10.7	14 h 01	70	Good coverage
June	27.2°C	15.5°C	124 mm	9.8	14 h 32	70	Good coverage
July	28.7°C	17.4°C	163 mm	11	14 h 20	55	Good coverage
August	28.7°C	16.7°C	117 mm	9	13 h 29	65	Good coverage
September	26.1°C	12.9°C	109 mm	7.1	12 h 21	75	Good coverage
October	20.4°C	6.5°C	98 mm	7.6	11 h 14	60	Good coverage
November	14.7°C	1.3°C	121 mm	8.4	10 h 15	28	Good coverage
December	9.2°C	-1.9°C	167 mm	11	9 h 46	5	Good coverage

Records at COALMONT, 1999–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	22.2°C31 Jan 2002	-25.0°C18 Jan 2024	74 mm3 Jan 2020	268 mm2020 · driest 51 mm in 2018	27
February	25.6°C24 Feb 2023	-20.0°C20 Feb 2015	106 mm6 Feb 2020	335 mm2020 · driest 44 mm in 2007	27
March	28.3°C26 Mar 2007	-13.3°C1 Mar 2002	92 mm1 Mar 2018	305 mm2021 · driest 39 mm in 2007	27
April	29.4°C20 Apr 2025	-7.8°C8 Apr 2007	156 mm28 Apr 2011	346 mm2011 · driest 33 mm in 2012	27
May	31.1°C31 May 2011	-4.4°C13 May 2013	155 mm6 May 2003	391 mm2003 · driest 29 mm in 2007	28
June	37.8°C30 Jun 2012	5.0°C7 Jun 2000	70 mm5 Jun 2016	210 mm2004 · driest 49 mm in 2006	28
July	36.7°C1 Jul 2012	8.3°C1 Jul 2008	89 mm2 Jul 2021	331 mm2012 · driest 42 mm in 2008	28
August	36.7°C24 Aug 2007	6.7°C14 Aug 2004	83 mm26 Aug 2008	267 mm2023 · driest 2 mm in 1999	27
September	35.0°C6 Sep 1999	0.0°C23 Sep 1999	133 mm17 Sep 2004	235 mm2012 · driest 6 mm in 2023	27
October	33.3°C4 Oct 2019	-6.1°C28 Oct 2001	68 mm7 Oct 2021	199 mm2019 · driest 12 mm in 2016	27
November	27.8°C4 Nov 2003	-12.2°C22 Nov 2008	89 mm28 Nov 2011	226 mm2011 · driest 43 mm in 2017	27
December	21.7°C28 Dec 2015	-20.6°C24 Dec 2022	98 mm26 Dec 2015	334 mm2015 · driest 64 mm in 2025	27

Typical days per month at COALMONT, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	23	4	2
February	0	0	19	4	2
March	<1	0	13	5	<1
April	5	0	5	5	<1
May	13	<1	<1	4	0
June	24	5	0	4	0
July	29	11	0	6	0
August	28	11	0	4	0
September	20	4	<1	3	0
October	6	<1	6	3	<1
November	<1	0	15	4	<1
December	0	0	21	5	2

How often, not how much — every day in COALMONT’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%	32%	15%	39%	4.4–10.4°C
February	2%	38%	16%	53%	6.8–12.8°C
March	16%	34%	16%	42%	12.0–17.8°C
April	39%	33%	16%	42%	17.7–21.9°C
May	55%	36%	14%	45%	22.2–25.0°C
June	67%	32%	14%	41%	25.7–28.8°C
July	64%	36%	17%	44%	27.1–30.0°C
August	71%	30%	13%	36%	27.1–30.6°C
September	74%	24%	10%	23%	24.2–28.2°C
October	49%	24%	9%	28%	18.8–22.6°C
November	15%	27%	12%	34%	11.7–17.4°C
December	1%	34%	17%	44%	7.0–11.6°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 26-year average. Warmest: 2024. Coolest: 2014.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4602483
NOAA station: USC00401887 · COALMONT
Station distance: 7.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 21 usable years
Daylight: Calculated from latitude 35.43°, 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 COALMONT is what differs

Gruetli-Laager→Coalmont→Beersheba Springs→Collins→Bergmantown→Cumberland Heights→

Or put two places side by side: Altamont vs Gruetli-Laager

Best time to visitAltamont.