United States · 1991–2020

Best time to visit
Altaville.

October leads for comfortable weather in Altaville: typically 26.4°C by day, 11.3°C at night, with 35 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortOctober

Typical high26.4°C

Typical low11.3°C

Rain in October35 mm

Comfort

October

October · May · June

85climate match

Beach

June

June · September · July

75climate match

Outdoors

April

April · November · October

84climate match

The weakest month is January, scoring 24 against October’s 85 — days reach only 14.1°C, 10° below the 24°C the score treats as ideal, and nights drop to 3.5°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

2414.1° / 3.5°

Feb

3515.7° / 4.4°

Mar

5018.4° / 6.3°

Apr

7021.1° / 7.7°

May

8426.4° / 11.2°

Jun

7431.9° / 15.1°

Jul

5336.2° / 18.6°

Aug

5635.7° / 18°

Sep

7132.6° / 15.5°

Oct

8526.4° / 11.3°

Nov

6018.9° / 6.6°

Dec

2714.1° / 3.3°

Monthly climate evidence for Altaville — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	14.1°C	3.5°C	157 mm	9.8	9 h 47	24	Strong coverage
February	15.7°C	4.4°C	128 mm	9.2	10 h 43	35	Strong coverage
March	18.4°C	6.3°C	115 mm	8.5	11 h 50	50	Strong coverage
April	21.1°C	7.7°C	67 mm	5.9	13 h 08	70	Strong coverage
May	26.4°C	11.2°C	38 mm	3.6	14 h 13	84	Strong coverage
June	31.9°C	15.1°C	10 mm	1.1	14 h 48	74	Strong coverage
July	36.2°C	18.6°C	1 mm	0.2	14 h 34	53	Strong coverage
August	35.7°C	18°C	1 mm	0.2	13 h 38	56	Strong coverage
September	32.6°C	15.5°C	5 mm	0.8	12 h 23	71	Strong coverage
October	26.4°C	11.3°C	35 mm	3.3	11 h 08	85	Strong coverage
November	18.9°C	6.6°C	76 mm	6	10 h 03	60	Strong coverage
December	14.1°C	3.3°C	133 mm	9	9 h 32	27	Strong coverage

Records at NEW MELONES DAM HQ, 1992–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	23.9°C30 Jan 2024	-4.4°C5 Jan 1993	79 mm28 Jan 2021	389 mm1995 · driest 1 mm in 2015	34
February	26.7°C13 Feb 2022	-3.9°C1 Feb 2014	70 mm3 Feb 2019	353 mm1998 · driest 0 mm in 2020	34
March	32.2°C20 Mar 2026	-1.7°C4 Mar 2009	87 mm11 Mar 1995	324 mm2023 · driest 2 mm in 2026	35
April	34.4°C28 Apr 2004	-0.6°C9 Apr 1999	51 mm4 Apr 2006	209 mm2006 · driest 2 mm in 2008	35
May	40.0°C29 May 2020	-0.6°C20 May 2011	52 mm17 May 1996	174 mm1998 · driest 0 mm in 2001	35
June	43.9°C22 Jun 2017	4.4°C2 Jun 2011	39 mm16 Jun 1995	75 mm2011 · driest 0 mm in 2021	34
July	45.6°C24 Jul 2006	7.2°C15 Jul 2011	11 mm3 Jul 2024	21 mm2024 · driest 0 mm in 2006	35
August	43.3°C29 Aug 2017	6.1°C21 Aug 2008	9 mm17 Aug 2024	19 mm2003 · driest 0 mm in 2013	34
September	45.6°C7 Sep 2022	1.1°C20 Sep 2007	29 mm21 Sep 2005	33 mm2005 · driest 0 mm in 2010	34
October	40.6°C2 Oct 2024	2.2°C27 Oct 1996	56 mm29 Oct 2000	139 mm2000 · driest 0 mm in 1995	34
November	30.0°C6 Nov 2010	-1.7°C19 Nov 1994	55 mm17 Nov 1996	174 mm2018 · driest 4 mm in 1995	34
December	24.4°C2 Dec 2021	-7.2°C16 Dec 2008	89 mm22 Dec 2015	339 mm2022 · driest 2 mm in 2011	34

Typical days per month at NEW MELONES DAM HQ, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	4	5
February	<1	0	2	5
March	2	0	<1	4
April	7	1	<1	2
May	19	9	<1	1
June	27	21	0	<1
July	31	30	0	0
August	31	30	0	0
September	28	22	0	<1
October	20	7	0	1
November	4	<1	1	3
December	0	0	5	5

How often, not how much — every day in NEW MELONES DAM HQ’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	8%	30%	16%	36%	12.7–16.3°C
February	17%	31%	16%	44%	13.6–18.6°C
March	36%	28%	13%	33%	15.9–21.4°C
April	59%	19%	8%	21%	18.4–23.6°C
May	85%	11%	4%	10%	23.1–29.2°C
June	96%	3%	<1%	<1%	29.1–34.2°C
July	99%	<1%	<1%	<1%	34.2–38.2°C
August	99%	1%	0%	<1%	34.4–37.2°C
September	97%	3%	<1%	1%	30.6–34.5°C
October	85%	10%	3%	11%	24.2–29.0°C
November	37%	20%	9%	21%	16.3–21.0°C
December	5%	30%	15%	39%	12.4–16.2°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.

1993Each stripe is one year’s mean temperature against the 32-year average. Warmest: 2014. Coolest: 1998.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5323542
NOAA station: USC00046174 · NEW MELONES DAM HQ
Station distance: 11 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 28 usable years
Daylight: Calculated from latitude 38.08°, 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 NEW MELONES DAM HQ is what differs

Copperopolis→Angels Camp→Murphys→Tuttletown→Vallecito→Big Valley→

Or put two places side by side: Altaville vs Copperopolis

Best time to visitAltaville.