United States · 1991–2020

Best time to visit
Alta.

September leads for comfortable weather in Alta: typically 23.6°C by day, 11°C at night, with 74 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high23.6°C

Typical low11°C

Rain in September74 mm

Comfort

September

September · August · June

84climate match

Beach

July

July · August · June

73climate match

Outdoors

September

September · May · October

77climate match

The weakest month is January, scoring 5 against September’s 84 — days reach only -3.3°C, 27° 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

5-3.3° / -13°

Feb

5-0.8° / -10.7°

Mar

76.6° / -4.2°

Apr

3514.9° / 2.3°

May

6421.1° / 9.1°

Jun

7226.6° / 15.3°

Jul

7128.1° / 17.3°

Aug

7426.8° / 15.8°

Sep

8423.6° / 11°

Oct

4816.1° / 3.9°

Nov

97° / -3.2°

Dec

5-0.3° / -9.4°

Monthly climate evidence for Alta — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-3.3°C	-13°C	9 mm	1.8	9 h 22	5	Strong coverage
February	-0.8°C	-10.7°C	17 mm	2.7	10 h 28	5	Strong coverage
March	6.6°C	-4.2°C	35 mm	3.9	11 h 48	7	Strong coverage
April	14.9°C	2.3°C	94 mm	7.3	13 h 19	35	Strong coverage
May	21.1°C	9.1°C	108 mm	9.2	14 h 36	64	Strong coverage
June	26.6°C	15.3°C	131 mm	8.7	15 h 18	72	Strong coverage
July	28.1°C	17.3°C	95 mm	6.5	15 h 01	71	Strong coverage
August	26.8°C	15.8°C	117 mm	7.2	13 h 55	74	Strong coverage
September	23.6°C	11°C	74 mm	5.9	12 h 26	84	Strong coverage
October	16.1°C	3.9°C	61 mm	5.7	10 h 58	48	Strong coverage
November	7°C	-3.2°C	45 mm	3.4	9 h 41	9	Strong coverage
December	-0.3°C	-9.4°C	13 mm	2	9 h 03	5	Strong coverage

What has changed

Alta runs +0.7°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

+1.4

Feb

+0.1

Mar

+1.7

Apr

-0.4

May

-0.3

Jun

+1.2

Jul

-0.3

Aug

-0.4

Sep

+1.8

Oct

0.0

Nov

+0.8

Dec

+2.5

September daytime highs, 2011–2025. Last recorded: 25.9°C.

Records at STORM LAKE, 1893–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	18.9°C25 Jan 1981	-35.0°C5 Jan 1924	26 mm25 Jan 1982	61 mm2023 · driest 0 mm in 2011	128
February	22.8°C27 Feb 2024	-36.7°C3 Feb 1905	56 mm20 Feb 1954	83 mm2005 · driest 0 mm in 2001	128
March	31.7°C22 Mar 2026	-31.1°C2 Mar 1962	64 mm28 Mar 2004	140 mm1983 · driest 0 mm in 2002	129
April	33.9°C23 Apr 1980	-16.7°C3 Apr 1975	61 mm21 Apr 1999	294 mm1999 · driest 0 mm in 2002	129
May	41.7°C30 May 1934	-6.7°C3 May 1967	138 mm9 May 2009	260 mm1995 · driest 0 mm in 1934	128
June	40.6°C10 Jun 1933	1.1°C3 Jun 1945	144 mm25 Jun 2005	302 mm1990 · driest 0 mm in 1913	125
July	42.8°C4 Jul 1936	5.6°C4 Jul 1967	159 mm22 Jul 2010	291 mm1992 · driest 0 mm in 1946	127
August	42.8°C3 Aug 1930	2.2°C13 Aug 1964	169 mm31 Aug 1962	262 mm1979 · driest 0 mm in 1922	124
September	38.3°C5 Sep 1913	-5.6°C29 Sep 1899	159 mm13 Sep 1978	316 mm1965 · driest 0 mm in 1940	126
October	32.8°C3 Oct 1997	-16.7°C29 Oct 1925	95 mm13 Oct 2023	213 mm1998 · driest 0 mm in 1932	126
November	25.6°C1 Nov 1968	-23.9°C21 Nov 1937	76 mm30 Nov 2000	180 mm2000 · driest 0 mm in 2007	128
December	18.9°C1 Dec 1998	-33.9°C29 Dec 1917	37 mm30 Dec 1931	65 mm2015 · driest 0 mm in 2002	128

Typical days per month at STORM LAKE, 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	26	<1	4
March	<1	0	22	1	3
April	3	<1	9	3	1
May	8	2	<1	3	0
June	20	7	0	4	0
July	25	9	0	3	0
August	22	6	0	3	0
September	13	3	<1	2	0
October	3	<1	7	2	<1
November	0	0	20	1	1
December	0	0	28	<1	4

The best month has moved. On the 1961–1990 numbers the strongest month here was August (scoring 78); on 2011–2025 it is September (92). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in STORM LAKE’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%	7%	<1%	4%	-8.2–1.3°C
February	0%	10%	2%	6%	-5.0–3.2°C
March	5%	15%	4%	14%	1.9–10.4°C
April	21%	23%	8%	27%	11.3–18.3°C
May	47%	28%	10%	37%	18.7–24.0°C
June	68%	28%	12%	32%	23.7–28.6°C
July	78%	22%	9%	23%	26.5–30.9°C
August	77%	21%	9%	21%	25.3–29.7°C
September	65%	19%	7%	19%	21.1–26.1°C
October	33%	15%	5%	12%	13.9–20.0°C
November	3%	11%	3%	5%	3.6–10.4°C
December	0%	9%	2%	3%	-4.3–3.4°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.

1893Each stripe is one year’s mean temperature against the 118-year average. Warmest: 1931. Coolest: 1979.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4846729
NOAA station: USC00137979 · STORM LAKE
Station distance: 8.5 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 25 usable years
Daylight: Calculated from latitude 42.67°, 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 STORM LAKE is what differs

Storm Lake→Newell→Schaller→Lakeside→Truesdale→Casino Beach→

Or put two places side by side: Alta vs Storm Lake

Best time to visitAlta.

September

July

September

The whole year,without the guesswork.

Alta runs +0.7°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Alta.

The whole year,
without the guesswork.

Alta runs +0.7°C
on the 1961–1990 baseline.

Nearby, measured,
and named.