Home·Canada·British Columbia

Canada · 1991–2020

Best time to visit
Grand Forks.

September leads for comfortable weather in Grand Forks: typically 23.5°C by day, 6.3°C at night, with 26 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high23.5°C

Typical low6.3°C

Rain in September26 mm

Comfort

September

September · June · July

81climate match

Beach

July

July · August · September

70climate match

Outdoors

September

September · May · June

81climate match

The weakest month is January, scoring 5 against September’s 81 — days reach only -0.5°C, 24° 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

5-0.5° / -6.8°

Feb

53.7° / -5°

Mar

1810° / -1.6°

Apr

4015.6° / 1.8°

May

6120.6° / 6°

Jun

7824° / 9.2°

Jul

7429.1° / 11.6°

Aug

7429° / 10.6°

Sep

8123.5° / 6.3°

Oct

3613.7° / 1.3°

Nov

54.4° / -2.4°

Dec

5-0.6° / -6.3°

Monthly climate evidence for Grand Forks — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-0.5°C	-6.8°C	60 mm	14.2	8 h 39	5	Good coverage
February	3.7°C	-5°C	34 mm	8.8	10 h 04	5	Good coverage
March	10°C	-1.6°C	34 mm	9.8	11 h 43	18	Good coverage
April	15.6°C	1.8°C	46 mm	10.4	13 h 38	40	Good coverage
May	20.6°C	6°C	64 mm	11.5	15 h 16	61	Good coverage
June	24°C	9.2°C	62 mm	11.1	16 h 11	78	Good coverage
July	29.1°C	11.6°C	36 mm	6.6	15 h 49	74	Good coverage
August	29°C	10.6°C	25 mm	4.7	14 h 23	74	Good coverage
September	23.5°C	6.3°C	26 mm	4.7	12 h 32	81	Good coverage
October	13.7°C	1.3°C	37 mm	8.3	10 h 42	36	Good coverage
November	4.4°C	-2.4°C	55 mm	12.7	9 h 04	5	Good coverage
December	-0.6°C	-6.3°C	61 mm	13.7	8 h 15	5	Good coverage

Records at GRAND FORKS, 1941–2008
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	16.1°C18 Jan 1944	-38.9°C20 Jan 1962	41 mm6 Jan 1962	93 mm1982 · driest 10 mm in 1987	67
February	19.4°C24 Feb 1946	-34.4°C1 Feb 1950	25 mm26 Feb 1945	71 mm1980 · driest 6 mm in 2005	68
March	24.0°C31 Mar 1994	-22.8°C4 Mar 1955	19 mm3 Mar 2004	65 mm1951 · driest 7 mm in 1965	68
April	31.7°C24 Apr 1977	-8.3°C20 Apr 1951	25 mm19 Apr 1997	83 mm1993 · driest 4 mm in 1977	67
May	36.1°C27 May 1946	-8.3°C1 May 1954	38 mm26 May 1998	132 mm1996 · driest 11 mm in 1950	67
June	37.0°C27 Jun 2006	-1.7°C13 Jun 1952	41 mm10 Jun 1948	113 mm2005 · driest 2 mm in 1945	67
July	42.2°C18 Jul 1941	1.1°C6 Jul 1952	48 mm7 Jul 1975	91 mm1992 · driest 1 mm in 1960	67
August	39.4°C17 Aug 1967	0.0°C17 Aug 1946	38 mm21 Aug 1972	110 mm1976 · driest 1 mm in 1955	67
September	36.7°C3 Sep 1950	-6.1°C28 Sep 1946	31 mm23 Sep 1986	90 mm1997 · driest 1 mm in 1991	67
October	30.0°C8 Oct 1945	-14.0°C31 Oct 1984	27 mm1 Oct 1957	124 mm1950 · driest 2 mm in 1965	67
November	18.9°C3 Nov 1975	-29.0°C28 Nov 1985	24 mm27 Nov 1996	130 mm1996 · driest 4 mm in 1952	67
December	17.2°C3 Dec 1943	-37.8°C30 Dec 1968	31 mm21 Dec 1967	97 mm1951 · driest 19 mm in 1978	67

Typical days per month at GRAND FORKS, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	28	1	9
February	0	0	23	<1	4
March	0	0	22	<1	3
April	1	0	10	<1	<1
May	7	2	2	2	<1
June	12	4	0	2	0
July	25	15	0	1	0
August	24	15	0	<1	0
September	13	4	2	<1	0
October	<1	0	12	<1	<1
November	0	0	21	1	5
December	0	0	29	1	11

How often, not how much — every day in GRAND FORKS’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%	38%	3%	47%	-4.5–1.7°C
February	0%	29%	2%	36%	0.2–5.7°C
March	1%	26%	1%	29%	6.3–11.5°C
April	18%	26%	2%	29%	13.3–18.4°C
May	46%	31%	4%	40%	17.7–23.3°C
June	62%	32%	4%	40%	21.6–26.8°C
July	81%	18%	3%	16%	26.3–31.5°C
August	80%	18%	3%	19%	25.1–31.1°C
September	64%	18%	2%	19%	19.4–26.4°C
October	12%	24%	2%	30%	11.9–16.2°C
November	0%	36%	3%	52%	2.2–6.6°C
December	0%	40%	4%	52%	-4.2–1.5°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.

1941Each stripe is one year’s mean temperature against the 64-year average. Warmest: 1998. Coolest: 1955.2007

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5964401
NOAA station: CA001133270 · GRAND FORKS
Station distance: 2.3 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 17 usable years
Daylight: Calculated from latitude 49.03°, 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 is what differs

Sion→Danville→Almond Gardens→Carson→Niagara→Nursery→

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

Best time to visitGrand Forks.

September

July

September

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Grand Forks.

The whole year,
without the guesswork.

Nearby, measured,
and named.