United States · 1991–2020

Best time to visit
Thompson.

August leads for comfortable weather in Thompson: typically 26.5°C by day, 13.6°C at night, with 77 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortAugust

Typical high26.5°C

Typical low13.6°C

Rain in August77 mm

Comfort

August

August · June · July

80climate match

Beach

July

July · August · June

62climate match

Outdoors

September

September · May · June

85climate match

The weakest month is January, scoring 5 against August’s 80 — days reach only -8.9°C, 33° 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

5-8.9° / -18.4°

Feb

5-6.1° / -16.2°

Mar

51.4° / -8.3°

Apr

2811.3° / -0.6°

May

5819.3° / 6.5°

Jun

7924.6° / 12.8°

Jul

7827° / 14.9°

Aug

8026.5° / 13.6°

Sep

7221.2° / 8.6°

Oct

3212.1° / 1.4°

Nov

52.1° / -6.8°

Dec

5-5.8° / -14.4°

Monthly climate evidence for Thompson — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-8.9°C	-18.4°C	12 mm	3.1	8 h 48	5	Strong coverage
February	-6.1°C	-16.2°C	14 mm	3.5	10 h 09	5	Strong coverage
March	1.4°C	-8.3°C	24 mm	4.4	11 h 44	5	Strong coverage
April	11.3°C	-0.6°C	30 mm	4.9	13 h 34	28	Strong coverage
May	19.3°C	6.5°C	78 mm	8.3	15 h 07	58	Strong coverage
June	24.6°C	12.8°C	102 mm	9.4	15 h 59	79	Strong coverage
July	27°C	14.9°C	91 mm	8	15 h 38	78	Strong coverage
August	26.5°C	13.6°C	77 mm	6.6	14 h 17	80	Strong coverage
September	21.2°C	8.6°C	61 mm	6.6	12 h 30	72	Strong coverage
October	12.1°C	1.4°C	51 mm	5.8	10 h 45	32	Strong coverage
November	2.1°C	-6.8°C	19 mm	3.6	9 h 12	5	Strong coverage
December	-5.8°C	-14.4°C	19 mm	4.4	8 h 25	5	Strong coverage

What has changed

Thompson runs +0.0°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

+2.1

Feb

-0.4

Mar

+0.7

Apr

-2.2

May

-1.2

Jun

0.0

Jul

-0.5

Aug

-0.9

Sep

+1.1

Oct

-0.8

Nov

+0.5

Dec

+1.7

August daytime highs, 2011–2025. Last recorded: 26.5°C.

Records at GRAND FORKS UNIV (NWS), 1893–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	12.2°C10 Jan 1990	-41.7°C11 Jan 1912	31 mm7 Jan 1989	67 mm1989 · driest 0 mm in 1901	133
February	19.4°C22 Feb 2000	-41.1°C16 Feb 1936	24 mm18 Feb 2026	56 mm1930 · driest 0 mm in 1935	132
March	28.3°C18 Mar 1910	-37.8°C10 Mar 1948	43 mm28 Mar 1905	70 mm1942 · driest 0 mm in 1969	131
April	36.7°C21 Apr 1980	-22.8°C2 Apr 1920	88 mm30 Apr 1898	165 mm2022 · driest 0 mm in 1988	133
May	40.6°C30 May 1934	-15.0°C3 May 1967	94 mm31 May 1991	202 mm1896 · driest 4 mm in 1951	129
June	40.6°C18 Jun 1933	-2.2°C1 Jun 1917	129 mm9 Jun 2002	242 mm1925 · driest 12 mm in 1903	129
July	42.8°C12 Jul 1936	2.2°C6 Jul 1908	74 mm1 Jul 1960	206 mm2001 · driest 0 mm in 2026	131
August	40.0°C7 Aug 1983	-1.1°C30 Aug 1931	98 mm30 Aug 1951	309 mm1944 · driest 2 mm in 1915	130
September	38.9°C5 Sep 1978	-11.7°C27 Sep 1893	120 mm20 Sep 2019	231 mm2019 · driest 5 mm in 1993	131
October	35.0°C3 Oct 1922	-22.8°C26 Oct 1919	69 mm16 Oct 1934	148 mm1998 · driest 1 mm in 1992	132
November	22.8°C5 Nov 1975	-37.2°C30 Nov 1905	45 mm23 Nov 1905	84 mm1922 · driest 0 mm in 1904	132
December	14.4°C20 Dec 1900	-38.3°C28 Dec 1933	23 mm29 Dec 2019	58 mm1918 · driest 0 mm in 1994	133

Typical days per month at GRAND FORKS UNIV (NWS), 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	31	<1	9
February	0	0	28	<1	7
March	0	0	28	<1	5
April	<1	<1	17	<1	2
May	7	2	4	3	<1
June	15	4	0	3	0
July	23	7	0	3	0
August	21	6	0	2	0
September	9	2	<1	2	0
October	1	<1	13	2	1
November	0	0	27	<1	5
December	0	0	31	<1	10

The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 83); on 2011–2025 it is August (86). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in GRAND FORKS UNIV (NWS)’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%	13%	<1%	8%	-14.7–-4.3°C
February	0%	12%	<1%	8%	-10.9–-1.7°C
March	<1%	14%	2%	9%	-3.4–5.9°C
April	13%	18%	4%	16%	7.4–15.8°C
May	41%	25%	7%	28%	16.8–23.2°C
June	62%	30%	10%	35%	22.0–27.4°C
July	75%	24%	8%	22%	25.2–29.9°C
August	74%	23%	7%	20%	24.3–29.1°C
September	50%	20%	5%	17%	18.2–24.1°C
October	16%	16%	4%	12%	9.6–16.2°C
November	<1%	13%	2%	8%	-2.0–5.7°C
December	0%	13%	<1%	8%	-10.8–-1.5°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.

1894Each stripe is one year’s mean temperature against the 119-year average. Warmest: 1987. Coolest: 1950.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5062174
NOAA station: USC00323621 · GRAND FORKS UNIV (NWS)
Station distance: 16.5 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 47.77°, 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 GRAND FORKS UNIV (NWS) is what differs

Grand Forks→East Grand Forks→Bygland→Mallory→Tabor→Calspur→

Or put two places side by side: Thompson vs Grand Forks

Best time to visitThompson.