United States · 1991–2020

Best time to visit
Ardrum (historical).

June leads for comfortable weather in Ardrum (historical): typically 23.7°C by day, 9.2°C at night, with 52 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJune

Typical high23.7°C

Typical low9.2°C

Rain in June52 mm

Comfort

June

June · September · August

81climate match

Beach

August

August · July · June

72climate match

Outdoors

September

September · May · June

84climate match

The weakest month is January, scoring 5 against June’s 81 — days reach only 0.7°C, 23° 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

50.7° / -7.1°

Feb

53.2° / -5.8°

Mar

189.5° / -2.2°

Apr

3814° / 0.9°

May

6119.4° / 5.3°

Jun

8123.7° / 9.2°

Jul

7330.8° / 12.5°

Aug

7629.1° / 11.5°

Sep

7922.7° / 7.1°

Oct

3713.5° / 1.3°

Nov

55.1° / -3.7°

Dec

50.1° / -7.2°

Monthly climate evidence for Ardrum (historical) — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	0.7°C	-7.1°C	24 mm	6.2	8 h 54	5	Good coverage
February	3.2°C	-5.8°C	27 mm	7.3	10 h 12	5	Good coverage
March	9.5°C	-2.2°C	25 mm	6.8	11 h 45	18	Good coverage
April	14°C	0.9°C	36 mm	7.1	13 h 31	38	Good coverage
May	19.4°C	5.3°C	49 mm	8.3	15 h 02	61	Good coverage
June	23.7°C	9.2°C	52 mm	8.7	15 h 52	81	Good coverage
July	30.8°C	12.5°C	15 mm	2.9	15 h 32	73	Good coverage
August	29.1°C	11.5°C	22 mm	4	14 h 13	76	Good coverage
September	22.7°C	7.1°C	26 mm	5.3	12 h 30	79	Good coverage
October	13.5°C	1.3°C	31 mm	6.9	10 h 47	37	Good coverage
November	5.1°C	-3.7°C	31 mm	6.2	9 h 17	5	Good coverage
December	0.1°C	-7.2°C	26 mm	7.4	8 h 32	5	Good coverage

Records at MISSOULA 6 NW WFO, 1893–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	16.1°C10 Jan 1953	-36.7°C26 Jan 1957	28 mm30 Jan 1907	103 mm1907 · driest 0 mm in 1908	93
February	18.3°C21 Feb 1905	-33.3°C10 Feb 1933	28 mm7 Feb 1918	68 mm1936 · driest 2 mm in 1915	93
March	25.6°C30 Mar 2004	-23.9°C5 Mar 1955	27 mm14 Mar 1908	59 mm1901 · driest 3 mm in 1911	94
April	32.2°C25 Apr 1910	-16.7°C1 Apr 1936	48 mm30 Apr 1951	80 mm1943 · driest 0 mm in 1908	95
May	36.1°C31 May 2025	-6.7°C1 May 1954	41 mm20 May 1957	162 mm1901 · driest 5 mm in 1907	95
June	39.4°C28 Jun 2015	-3.3°C20 Jun 1906	44 mm4 Jun 1905	122 mm1907 · driest 2 mm in 1918	92
July	40.6°C22 Jul 1936	-2.8°C1 Jul 1901	40 mm3 Jul 1956	86 mm1909 · driest 0 mm in 1917	94
August	40.0°C4 Aug 1961	-3.9°C19 Aug 1901	52 mm7 Aug 2009	78 mm2009 · driest 0 mm in 1917	92
September	36.1°C2 Sep 2017	-9.4°C25 Sep 1926	39 mm9 Sep 1931	95 mm1908 · driest 0 mm in 2012	94
October	28.9°C13 Oct 1918	-20.0°C29 Oct 1917	49 mm7 Oct 1893	79 mm2020 · driest 0 mm in 1945	92
November	20.6°C5 Nov 2020	-30.6°C16 Nov 1955	59 mm5 Nov 1927	139 mm1927 · driest 0 mm in 1904	92
December	18.9°C1 Dec 2021	-33.3°C17 Dec 1964	36 mm23 Dec 1917	165 mm1917 · driest 3 mm in 1909	90

Typical days per month at MISSOULA 6 NW WFO, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	30	<1	9
February	0	0	26	<1	9
March	<1	0	23	<1	5
April	<1	0	12	<1	2
May	6	1	3	1	<1
June	14	4	0	2	<1
July	28	20	0	<1	0
August	25	16	0	<1	0
September	12	4	<1	<1	<1
October	1	0	12	<1	<1
November	0	0	24	<1	5
December	0	0	30	<1	10

How often, not how much — every day in MISSOULA 6 NW WFO’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%	19%	-4.2–2.8°C
February	0%	20%	<1%	20%	-0.2–6.2°C
March	2%	18%	1%	14%	5.0–11.3°C
April	19%	20%	2%	18%	12.0–18.2°C
May	43%	25%	5%	30%	16.9–22.6°C
June	61%	27%	5%	30%	20.9–26.7°C
July	86%	13%	2%	9%	27.3–32.5°C
August	84%	14%	2%	11%	26.7–31.2°C
September	61%	18%	3%	17%	18.8–25.5°C
October	18%	19%	2%	19%	11.9–17.2°C
November	<1%	21%	1%	22%	3.0–8.3°C
December	0%	22%	1%	23%	-2.9–3.8°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.

1895Each stripe is one year’s mean temperature against the 78-year average. Warmest: 1934. Coolest: 1916.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5637545
NOAA station: USC00245740 · MISSOULA 6 NW WFO
Station distance: 8.3 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 18 usable years
Daylight: Calculated from latitude 46.99°, 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 MISSOULA 6 NW WFO is what differs

Frenchtown→Wye→Evaro→De Smet→Grant Creek (historical)→Nagos→

Or put two places side by side: Ardrum (historical) vs Frenchtown

Best time to visitArdrum (historical).