United States · 1991–2020

Best time to visit
Helena-West Helena.

October leads for comfortable weather in Helena-West Helena: typically 24.3°C by day, 11.2°C at night, with 89 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortOctober

Typical high24.3°C

Typical low11.2°C

Rain in October89 mm

Comfort

October

October · April · September

82climate match

Beach

September

September · June · August

83climate match

Outdoors

October

October · March · November

73climate match

The weakest month is January, scoring 13 against October’s 82 — days reach only 10.2°C, 14° below the 24°C the score treats as ideal, and nights drop to -0.2°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

1310.2° / -0.2°

Feb

2713.2° / 1.3°

Mar

4818.1° / 5.9°

Apr

7223.4° / 10.8°

May

6828.1° / 16.2°

Jun

5332.1° / 20.7°

Jul

4733.3° / 22.4°

Aug

5233° / 21.9°

Sep

7030.1° / 18.1°

Oct

8224.3° / 11.2°

Nov

4717.2° / 5.4°

Dec

1912.1° / 1.2°

Monthly climate evidence for Helena-West Helena — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	10.2°C	-0.2°C	110 mm	7.4	10 h 04	13	Strong coverage
February	13.2°C	1.3°C	107 mm	6.2	10 h 53	27	Strong coverage
March	18.1°C	5.9°C	120 mm	7.8	11 h 52	48	Strong coverage
April	23.4°C	10.8°C	141 mm	7	13 h 00	72	Strong coverage
May	28.1°C	16.2°C	125 mm	7.6	13 h 57	68	Strong coverage
June	32.1°C	20.7°C	90 mm	5.4	14 h 27	53	Strong coverage
July	33.3°C	22.4°C	87 mm	5.2	14 h 15	47	Strong coverage
August	33°C	21.9°C	68 mm	4.6	13 h 27	52	Strong coverage
September	30.1°C	18.1°C	62 mm	3.7	12 h 21	70	Strong coverage
October	24.3°C	11.2°C	89 mm	5.1	11 h 15	82	Strong coverage
November	17.2°C	5.4°C	109 mm	6.3	10 h 19	47	Strong coverage
December	12.1°C	1.2°C	127 mm	7	9 h 51	19	Strong coverage

What has changed

Helena-West Helena runs +0.6°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

+1.0

Feb

+0.9

Mar

+1.2

Apr

-0.1

May

+0.2

Jun

+0.5

Jul

-0.3

Aug

+0.1

Sep

+1.5

Oct

+0.4

Nov

+0.1

Dec

+1.3

October daytime highs, 2011–2025. Last recorded: 24.8°C.

Records at HELENA, 1897–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	26.1°C30 Jan 1975	-22.8°C18 Jan 1930	132 mm8 Jan 1930	438 mm1937 · driest 10 mm in 2003	108
February	27.8°C15 Feb 1911	-19.4°C2 Feb 1951	141 mm10 Feb 1966	379 mm2018 · driest 22 mm in 1972	110
March	33.3°C29 Mar 1928	-11.7°C20 Mar 1965	147 mm12 Mar 1927	361 mm2016 · driest 10 mm in 2007	110
April	35.0°C22 Apr 2010	-2.8°C13 Apr 1940	127 mm27 Apr 2011	480 mm1991 · driest 14 mm in 1930	110
May	39.4°C28 May 1926	1.7°C4 May 2013	193 mm15 May 1974	359 mm1974 · driest 11 mm in 1911	109
June	42.2°C20 Jun 1925	6.7°C1 Jun 1966	176 mm24 Jun 1980	302 mm1974 · driest 1 mm in 1953	110
July	43.9°C28 Jul 1930	9.4°C15 Jul 1967	152 mm22 Jul 1980	267 mm1931 · driest 9 mm in 2025	110
August	42.2°C19 Aug 1925	8.9°C31 Aug 1946	145 mm14 Aug 1982	220 mm1911 · driest 0 mm in 1980	111
September	45.0°C6 Sep 1925	-1.1°C30 Sep 1967	129 mm27 Sep 1959	238 mm1977 · driest 0 mm in 1897	109
October	36.7°C4 Oct 1925	-3.9°C31 Oct 1939	145 mm7 Oct 1984	356 mm1984 · driest 0 mm in 1963	110
November	31.1°C4 Nov 1909	-11.1°C15 Nov 1940	161 mm28 Nov 2001	445 mm1987 · driest 6 mm in 1949	112
December	27.2°C16 Dec 1924	-20.0°C25 Dec 1983	146 mm4 Dec 1978	439 mm1982 · driest 18 mm in 2025	112

Typical days per month at HELENA, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	16	4
February	<1	0	12	3
March	4	<1	4	4
April	13	2	<1	4
May	24	13	0	4
June	29	24	0	3
July	30	27	0	3
August	30	26	0	2
September	27	18	0	2
October	16	4	<1	3
November	3	<1	5	3
December	0	0	14	4

How often, not how much — every day in HELENA’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	7%	26%	13%	29%	6.8–13.7°C
February	12%	27%	13%	29%	9.4–16.3°C
March	32%	28%	14%	30%	14.8–20.8°C
April	57%	26%	14%	28%	21.1–25.4°C
May	72%	26%	13%	26%	25.4–30.0°C
June	78%	22%	10%	24%	29.6–33.8°C
July	79%	21%	9%	20%	31.1–34.9°C
August	82%	19%	8%	17%	30.9–35.2°C
September	83%	17%	8%	13%	27.8–32.6°C
October	70%	17%	8%	15%	22.2–26.9°C
November	29%	23%	12%	24%	14.6–20.0°C
December	7%	26%	13%	30%	9.4–14.6°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.

1904Each stripe is one year’s mean temperature against the 93-year average. Warmest: 1925. Coolest: 1979.2024

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 6331911
NOAA station: USC00033242 · HELENA
Station distance: 0.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 27 usable years
Daylight: Calculated from latitude 34.53°, 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 HELENA is what differs

West Helena→Helena→Friars Point→Lakeview→Coahoma→Lula→

Or put two places side by side: Helena-West Helena vs West Helena

Best time to visitHelena-West Helena.

October

September

October

The whole year,without the guesswork.

Helena-West Helena runs +0.6°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Helena-West Helena.

The whole year,
without the guesswork.

Helena-West Helena runs +0.6°C
on the 1961–1990 baseline.

Nearby, measured,
and named.