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Canada · 1991–2020

Best time to visit
Jean Marie River.

July leads for comfortable weather in Jean Marie River: typically 23.9°C by day, 11.6°C at night, with 58 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high23.9°C

Typical low11.6°C

Rain in July58 mm

Comfort

July

July · June · August

85climate match

Beach

July

July · June · August

49climate match

Outdoors

June

June · August · July

84climate match

The weakest month is January, scoring 5 against July’s 85 — days reach only -19.7°C, 44° 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

5-19.7° / -28.3°

Feb

5-14.3° / -24.7°

Mar

5-6.8° / -19.8°

Apr

55.9° / -6.7°

May

4715.5° / 2.6°

Jun

7722.1° / 9.2°

Jul

8523.9° / 11.6°

Aug

7121.1° / 9°

Sep

4214° / 3°

Oct

52.4° / -5.3°

Nov

5-10.5° / -18.3°

Dec

5-17.6° / -25.9°

Monthly climate evidence for Jean Marie River — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-19.7°C	-28.3°C	19 mm	6.1	6 h 13	5	Good coverage
February	-14.3°C	-24.7°C	16 mm	5	8 h 48	5	Good coverage
March	-6.8°C	-19.8°C	16 mm	4.8	11 h 31	5	Good coverage
April	5.9°C	-6.7°C	14 mm	3.6	14 h 36	5	Good coverage
May	15.5°C	2.6°C	34 mm	6.1	17 h 29	47	Good coverage
June	22.1°C	9.2°C	51 mm	7.6	19 h 26	77	Good coverage
July	23.9°C	11.6°C	58 mm	8.3	18 h 36	85	Good coverage
August	21.1°C	9°C	63 mm	8.3	15 h 53	71	Good coverage
September	14°C	3°C	34 mm	6.9	12 h 48	42	Good coverage
October	2.4°C	-5.3°C	32 mm	6.9	9 h 51	5	Good coverage
November	-10.5°C	-18.3°C	24 mm	6.2	7 h 02	5	Good coverage
December	-17.6°C	-25.9°C	20 mm	6.7	5 h 23	5	Good coverage

Records at FORT SIMPSON A, 1963–2014
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	13.2°C3 Jan 1985	-50.0°C12 Jan 1972	13 mm1 Jan 1973	43 mm1984 · driest 1 mm in 1979	51
February	14.4°C28 Feb 1968	-53.3°C3 Feb 1968	14 mm13 Feb 2006	53 mm1974 · driest 3 mm in 2010	51
March	16.1°C30 Mar 1994	-42.2°C7 Mar 1974	19 mm21 Mar 1986	52 mm1979 · driest 0 mm in 1990	51
April	25.5°C24 Apr 1977	-38.3°C4 Apr 1979	38 mm25 Apr 1981	64 mm1981 · driest 0 mm in 1965	51
May	32.8°C27 May 1995	-17.5°C6 May 2002	40 mm17 May 2012	99 mm1977 · driest 1 mm in 2003	51
June	33.9°C15 Jun 1969	-2.2°C7 Jun 1965	86 mm30 Jun 1988	174 mm1988 · driest 5 mm in 2004	51
July	36.6°C25 Jul 1994	-1.1°C24 Jul 1967	57 mm14 Jul 2000	130 mm1981 · driest 12 mm in 1964	51
August	35.4°C2 Aug 1984	-3.7°C24 Aug 1986	52 mm2 Aug 2003	119 mm2001 · driest 9 mm in 1994	51
September	30.0°C15 Sep 1967	-20.6°C28 Sep 1983	42 mm7 Sep 2009	124 mm2009 · driest 7 mm in 1977	51
October	24.9°C4 Oct 2003	-27.7°C31 Oct 1984	46 mm1 Oct 1981	149 mm1981 · driest 2 mm in 1969	50
November	12.2°C1 Nov 1969	-41.7°C27 Nov 1966	27 mm12 Nov 1981	49 mm1981 · driest 4 mm in 1979	51
December	14.5°C23 Dec 1999	-50.6°C12 Dec 1975	13 mm6 Dec 1981	42 mm2004 · driest 4 mm in 2006	51

Typical days per month at FORT SIMPSON A, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	31	0	13
February	0	0	28	<1	12
March	0	0	30	<1	10
April	0	0	26	<1	5
May	2	<1	9	1	2
June	9	1	<1	1	<1
July	13	2	0	2	0
August	8	1	<1	2	<1
September	<1	0	8	<1	1
October	0	0	27	<1	9
November	0	0	30	<1	13
December	0	0	30	<1	13

How often, not how much — every day in FORT SIMPSON A’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%	21%	<1%	20%	-25.7–-16.2°C
February	0%	18%	<1%	14%	-20.9–-10.4°C
March	0%	17%	<1%	14%	-11.3–-2.3°C
April	1%	13%	<1%	9%	0.7–8.7°C
May	21%	19%	3%	20%	12.5–18.0°C
June	55%	26%	4%	29%	20.4–23.1°C
July	66%	26%	5%	27%	21.9–25.4°C
August	50%	25%	6%	27%	18.9–23.4°C
September	15%	21%	2%	19%	9.7–16.4°C
October	<1%	23%	2%	24%	-0.7–5.2°C
November	0%	22%	<1%	22%	-16.3–-7.3°C
December	0%	20%	<1%	18%	-23.2–-13.6°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.

1964Each stripe is one year’s mean temperature against the 50-year average. Warmest: 1998. Coolest: 1966.2013

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5986031
NOAA station: CA002202101 · FORT SIMPSON A
Station distance: 41.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 23 usable years
Daylight: Calculated from latitude 61.52°, 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 FORT SIMPSON A is what differs

Fort Simpson→Berens Landing→Naylors Landing→

Or put two places side by side: Jean Marie River vs Fort Simpson

Best time to visitJean Marie River.

July

July

June

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Jean Marie River.

The whole year,
without the guesswork.

Nearby, measured,
and named.