United States · 1991–2020

Best time to visit
Jasper.

September leads for comfortable weather in Jasper: typically 27°C by day, 12.7°C at night, with 107 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high27°C

Typical low12.7°C

Rain in September107 mm

Comfort

September

September · May · August

73climate match

Beach

August

August · July · June

73climate match

Outdoors

October

October · April · September

78climate match

The weakest month is January, scoring 5 against September’s 73 — days reach only 4.7°C, 19° 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

54.7° / -6.1°

Feb

57.4° / -4.5°

Mar

1912.9° / 0.2°

Apr

4419.3° / 6°

May

6724.3° / 11.5°

Jun

6128.7° / 16.3°

Jul

5630.5° / 18°

Aug

6630.3° / 16.9°

Sep

7327° / 12.7°

Oct

6220.7° / 6.6°

Nov

2513.3° / 0.8°

Dec

57.2° / -3.4°

Monthly climate evidence for Jasper — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	4.7°C	-6.1°C	92 mm	7.8	9 h 46	5	Strong coverage
February	7.4°C	-4.5°C	81 mm	7.3	10 h 42	5	Strong coverage
March	12.9°C	0.2°C	117 mm	9.4	11 h 50	19	Strong coverage
April	19.3°C	6°C	155 mm	11.2	13 h 08	44	Strong coverage
May	24.3°C	11.5°C	164 mm	11.8	14 h 14	67	Strong coverage
June	28.7°C	16.3°C	140 mm	9.6	14 h 49	61	Strong coverage
July	30.5°C	18°C	121 mm	8.8	14 h 36	56	Strong coverage
August	30.3°C	16.9°C	75 mm	7.2	13 h 39	66	Strong coverage
September	27°C	12.7°C	107 mm	6.7	12 h 23	73	Strong coverage
October	20.7°C	6.6°C	92 mm	7	11 h 08	62	Strong coverage
November	13.3°C	0.8°C	102 mm	7.7	10 h 02	25	Strong coverage
December	7.2°C	-3.4°C	96 mm	8.2	9 h 30	5	Strong coverage

What has changed

Jasper runs +1.5°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

+1.8

Feb

+2.6

Mar

+1.9

Apr

+1.2

May

+1.3

Jun

+1.2

Jul

+1.0

Aug

+0.7

Sep

+1.6

Oct

+1.6

Nov

+0.7

Dec

+2.8

September daytime highs, 2011–2025. Last recorded: 27.9°C.

Records at DUBOIS SRN IN FORAGE FARM, 1955–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	21.1°C13 Jan 2005	-31.7°C19 Jan 1994	107 mm23 Jan 1982	243 mm1982 · driest 12 mm in 1981	70
February	26.1°C25 Feb 2017	-26.1°C20 Feb 2015	71 mm16 Feb 2023	225 mm2018 · driest 13 mm in 1963	72
March	30.6°C23 Mar 2026	-21.7°C6 Mar 1960	122 mm19 Mar 2008	335 mm1964 · driest 34 mm in 1957	71
April	31.1°C27 Apr 1989	-8.3°C7 Apr 1982	144 mm29 Apr 1996	345 mm2011 · driest 22 mm in 1962	72
May	33.9°C28 May 2012	-4.4°C9 May 2020	99 mm31 May 1997	336 mm1996 · driest 34 mm in 1987	72
June	42.2°C29 Jun 2012	2.8°C1 Jun 1966	137 mm7 Jun 1990	322 mm2015 · driest 16 mm in 1988	72
July	42.8°C8 Jul 2012	7.8°C7 Jul 1972	144 mm23 Jul 2017	324 mm1979 · driest 29 mm in 1983	70
August	38.9°C16 Aug 2007	5.6°C29 Aug 1986	77 mm13 Aug 1973	213 mm1977 · driest 16 mm in 1955	67
September	38.3°C4 Sep 2011	0.6°C30 Sep 1993	106 mm9 Sep 2018	246 mm2012 · driest 0 mm in 2004	70
October	35.0°C2 Oct 2019	-7.8°C24 Oct 1981	105 mm9 Oct 2009	250 mm2009 · driest 3 mm in 2024	70
November	29.4°C2 Nov 2016	-16.7°C30 Nov 1958	108 mm16 Nov 1985	243 mm2010 · driest 23 mm in 2009	70
December	25.6°C4 Dec 1998	-28.9°C22 Dec 1989	81 mm17 Dec 2001	198 mm1990 · driest 11 mm in 1976	69

Typical days per month at DUBOIS SRN IN FORAGE FARM, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	25	3	2
February	<1	0	22	3	2
March	1	0	16	4	<1
April	6	<1	5	5	0
May	16	4	<1	5	0
June	26	13	0	4	0
July	30	19	0	4	0
August	30	18	0	2	0
September	21	9	0	3	0
October	8	1	4	3	<1
November	<1	0	14	4	<1
December	0	0	22	3	1

The best month has moved. On the 1961–1990 numbers the strongest month here was September (scoring 85); on 2011–2025 it is May (76). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in DUBOIS SRN IN FORAGE FARM’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%	24%	9%	23%	0.7–7.5°C
February	2%	26%	10%	29%	2.8–10.1°C
March	10%	31%	13%	39%	8.2–15.9°C
April	29%	34%	14%	44%	16.4–20.9°C
May	52%	35%	15%	46%	21.1–26.3°C
June	69%	30%	13%	36%	26.3–29.9°C
July	71%	29%	12%	33%	28.3–31.8°C
August	76%	23%	9%	23%	28.0–31.7°C
September	73%	22%	10%	19%	24.1–29.2°C
October	43%	22%	9%	24%	17.7–22.6°C
November	11%	27%	11%	30%	9.4–15.9°C
December	1%	26%	11%	30%	2.9–10.2°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.

1955Each stripe is one year’s mean temperature against the 62-year average. Warmest: 1998. Coolest: 2014.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4259640
NOAA station: USC00122309 · DUBOIS SRN IN FORAGE FARM
Station distance: 21.5 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 25 usable years
Daylight: Calculated from latitude 38.39°, 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 DUBOIS SRN IN FORAGE FARM is what differs

Dubois→Birdseye→Celestine→Crystal→Cuzco→Ellsworth→

Or put two places side by side: Jasper vs Dubois

Best time to visitJasper.