United States · 1991–2020

Best time to visit
Nelson.

September leads for comfortable weather in Nelson: typically 26.3°C by day, 13.5°C at night, with 105 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high26.3°C

Typical low13.5°C

Rain in September105 mm

Comfort

September

September · May · August

77climate match

Beach

August

August · July · June

74climate match

Outdoors

October

October · April · September

80climate match

The weakest month is January, scoring 5 against September’s 77 — days reach only 2.7°C, 21° 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

52.7° / -7.4°

Feb

55.7° / -5.2°

Mar

2312.1° / 0.1°

Apr

4918.3° / 6°

May

7223.7° / 12.4°

Jun

6128.7° / 17.7°

Jul

5330.8° / 19.7°

Aug

6230.1° / 18.3°

Sep

7726.3° / 13.5°

Oct

6019.6° / 6.9°

Nov

2611.7° / 0.7°

Dec

55.2° / -4.4°

Monthly climate evidence for Nelson — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	2.7°C	-7.4°C	36 mm	4.8	9 h 42	5	Strong coverage
February	5.7°C	-5.2°C	48 mm	5.1	10 h 40	5	Strong coverage
March	12.1°C	0.1°C	78 mm	8	11 h 50	23	Strong coverage
April	18.3°C	6°C	112 mm	9	13 h 10	49	Strong coverage
May	23.7°C	12.4°C	144 mm	10.7	14 h 17	72	Strong coverage
June	28.7°C	17.7°C	129 mm	9	14 h 53	61	Strong coverage
July	30.8°C	19.7°C	118 mm	7.8	14 h 39	53	Strong coverage
August	30.1°C	18.3°C	99 mm	6.6	13 h 41	62	Strong coverage
September	26.3°C	13.5°C	105 mm	6.4	12 h 24	77	Strong coverage
October	19.6°C	6.9°C	84 mm	7.1	11 h 06	60	Strong coverage
November	11.7°C	0.7°C	68 mm	6.3	9 h 59	26	Strong coverage
December	5.2°C	-4.4°C	53 mm	5.7	9 h 27	5	Strong coverage

What has changed

Nelson runs -0.5°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

-0.3

Feb

-1.0

Mar

-0.3

Apr

-2.0

May

-1.1

Jun

-0.1

Jul

-1.2

Aug

-1.2

Sep

+0.6

Oct

-0.6

Nov

-0.4

Dec

+1.4

September daytime highs, 2011–2025. Last recorded: 29.0°C.

Records at MARSHALL, 1893–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	23.9°C23 Jan 1909	-29.4°C18 Jan 1930	69 mm2 Jan 1897	183 mm1916 · driest 1 mm in 2009	125
February	27.8°C29 Feb 1972	-32.2°C13 Feb 1905	88 mm22 Feb 1985	123 mm2008 · driest 0 mm in 1978	127
March	33.3°C21 Mar 1910	-25.6°C5 Mar 1960	84 mm25 Mar 1920	246 mm1973 · driest 9 mm in 1956	128
April	36.1°C29 Apr 1895	-14.4°C5 Apr 1920	149 mm21 Apr 1973	297 mm1973 · driest 10 mm in 1948	130
May	38.3°C31 May 1934	-3.9°C4 May 1907	124 mm16 May 1990	303 mm1935 · driest 15 mm in 2014	131
June	40.6°C19 Jun 1936	3.9°C4 Jun 1945	248 mm25 Jun 2021	407 mm2021 · driest 4 mm in 1936	128
July	44.4°C14 Jul 1954	7.8°C5 Jul 1915	130 mm15 Jul 1910	327 mm2025 · driest 3 mm in 1981	127
August	43.3°C9 Aug 1934	4.4°C21 Aug 1895	118 mm12 Aug 1993	242 mm2016 · driest 1 mm in 1909	125
September	40.6°C6 Sep 1925	-2.2°C30 Sep 1895	148 mm22 Sep 1970	415 mm1905 · driest 4 mm in 1960	126
October	36.1°C7 Oct 1939	-7.8°C31 Oct 1925	109 mm8 Oct 1914	278 mm1941 · driest 1 mm in 1895	126
November	30.6°C8 Nov 1945	-19.4°C8 Nov 1991	136 mm1 Nov 1977	223 mm1928 · driest 0 mm in 1955	124
December	23.3°C16 Dec 2021	-31.1°C23 Dec 1989	59 mm11 Dec 2003	156 mm1895 · driest 0 mm in 1977	124

Typical days per month at MARSHALL, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	27	<1	2
February	0	0	22	1	1
March	1	0	16	3	<1
April	6	<1	4	4	0
May	14	4	<1	4	0
June	25	13	0	4	0
July	29	19	0	4	0
August	29	16	0	3	0
September	19	8	<1	3	0
October	7	1	3	3	0
November	<1	0	13	2	<1
December	0	0	24	2	1

How often, not how much — every day in MARSHALL’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%	16%	4%	11%	-0.6–7.6°C
February	4%	18%	5%	16%	0.8–10.1°C
March	18%	23%	8%	22%	8.7–17.1°C
April	37%	29%	12%	33%	16.8–22.1°C
May	59%	30%	13%	35%	21.9–27.2°C
June	71%	28%	13%	31%	27.3–32.2°C
July	78%	22%	10%	20%	29.7–34.1°C
August	79%	20%	9%	19%	29.0–33.4°C
September	73%	22%	11%	22%	24.6–29.7°C
October	51%	20%	8%	18%	18.0–24.1°C
November	14%	18%	7%	13%	9.3–15.7°C
December	1%	16%	5%	11%	2.2–9.1°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 111-year average. Warmest: 1931. Coolest: 1996.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4400155
NOAA station: USW00013991 · MARSHALL
Station distance: 22.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 28 usable years
Daylight: Calculated from latitude 38.99°, 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 MARSHALL is what differs

Marshall→Slater→Malta Bend→Gilliam→Mount Leonard→Blosser (historical)→

Or put two places side by side: Nelson vs Marshall

Best time to visitNelson.