United States · 1991–2020

Best time to visit
Powell.

September leads for comfortable weather in Powell: typically 25.7°C by day, 6.6°C at night, with 19 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.7°C

Typical low6.6°C

Rain in September19 mm

Comfort

September

September · June · May

79climate match

Beach

July

July · August · June

66climate match

Outdoors

May

May · September · June

77climate match

The weakest month is January, scoring 5 against September’s 79 — days reach only 1.4°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

51.4° / -5°

Feb

55.5° / -4.6°

Mar

2111.4° / -1.4°

Apr

4916.8° / 1.7°

May

7122.2° / 6°

Jun

7825.6° / 9.1°

Jul

6931.2° / 11.3°

Aug

6831.3° / 10.6°

Sep

7925.7° / 6.6°

Oct

4315.6° / 1.4°

Nov

56.6° / -1.4°

Dec

51.2° / -4.7°

Monthly climate evidence for Powell — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	1.4°C	-5°C	58 mm	10.3	8 h 41	5	Good coverage
February	5.5°C	-4.6°C	39 mm	7.2	10 h 05	5	Good coverage
March	11.4°C	-1.4°C	53 mm	9	11 h 44	21	Good coverage
April	16.8°C	1.7°C	36 mm	7	13 h 37	49	Strong coverage
May	22.2°C	6°C	52 mm	8.3	15 h 13	71	Strong coverage
June	25.6°C	9.1°C	51 mm	7	16 h 08	78	Strong coverage
July	31.2°C	11.3°C	23 mm	3.7	15 h 46	69	Strong coverage
August	31.3°C	10.6°C	16 mm	2.7	14 h 21	68	Strong coverage
September	25.7°C	6.6°C	19 mm	3.8	12 h 31	79	Strong coverage
October	15.6°C	1.4°C	42 mm	7.1	10 h 43	43	Good coverage
November	6.6°C	-1.4°C	57 mm	10	9 h 06	5	Strong coverage
December	1.2°C	-4.7°C	69 mm	10.4	8 h 17	5	Good coverage

Records at COLVILLE, 1899–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	13.9°C26 Jan 2003	-33.9°C30 Jan 1950	38 mm13 Jan 2020	116 mm2020 · driest 8 mm in 2025	82
February	17.2°C25 Feb 1995	-33.9°C9 Feb 1933	34 mm16 Feb 2017	106 mm1940 · driest 0 mm in 2026	83
March	24.4°C14 Mar 1910	-26.1°C5 Mar 2019	33 mm15 Mar 2012	116 mm2012 · driest 1 mm in 1906	82
April	33.3°C25 Apr 1910	-11.1°C1 Apr 1936	32 mm13 Apr 1920	68 mm2012 · driest 0 mm in 2024	82
May	35.6°C30 May 1936	-4.4°C5 May 1906	43 mm27 May 1998	182 mm1998 · driest 0 mm in 1912	84
June	44.4°C30 Jun 2021	-2.2°C3 Jun 1918	50 mm25 Jun 1999	155 mm2012 · driest 0 mm in 1912	84
July	42.8°C23 Jul 1994	-0.6°C29 Jul 1917	45 mm4 Jul 2022	86 mm1993 · driest 0 mm in 2018	84
August	41.1°C2 Aug 1994	-1.7°C29 Aug 1902	48 mm18 Aug 2004	108 mm1907 · driest 0 mm in 2012	85
September	40.0°C2 Sep 2025	-6.7°C28 Sep 1900	41 mm11 Sep 1927	169 mm1927 · driest 0 mm in 1908	85
October	30.6°C3 Oct 1902	-15.6°C31 Oct 1935	47 mm1 Oct 1940	148 mm2016 · driest 1 mm in 2002	84
November	21.1°C1 Nov 1903	-23.9°C21 Nov 1900	33 mm19 Nov 1905	112 mm1937 · driest 0 mm in 1929	84
December	15.6°C15 Dec 2025	-30.6°C15 Dec 1922	51 mm28 Dec 2022	148 mm2002 · driest 15 mm in 1930	84

Typical days per month at COLVILLE, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	25	1	7
February	0	0	23	<1	4
March	0	0	19	1	2
April	2	<1	11	<1	<1
May	9	3	2	2	0
June	16	6	0	2	0
July	27	20	0	<1	0
August	27	20	0	<1	0
September	17	8	<1	<1	0
October	2	<1	13	1	<1
November	0	0	18	1	3
December	0	0	26	2	7

How often, not how much — every day in COLVILLE’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%	31%	4%	39%	-3.0–2.6°C
February	0%	25%	3%	26%	1.1–7.3°C
March	4%	21%	3%	24%	8.4–13.9°C
April	30%	19%	2%	19%	14.6–20.2°C
May	60%	22%	4%	24%	19.7–25.1°C
June	74%	22%	4%	24%	23.5–28.2°C
July	91%	10%	2%	5%	28.7–33.5°C
August	90%	9%	1%	6%	27.3–32.6°C
September	74%	14%	2%	12%	21.6–27.7°C
October	22%	20%	3%	23%	13.6–18.5°C
November	<1%	31%	5%	41%	3.7–8.2°C
December	0%	34%	5%	44%	-2.0–3.1°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.

1901Each stripe is one year’s mean temperature against the 77-year average. Warmest: 2015. Coolest: 1916.2024

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5555249
NOAA station: USC00451630 · COLVILLE
Station distance: 16.5 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 24 usable years
Daylight: Calculated from latitude 48.71°, 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 COLVILLE is what differs

Colville→Kettle Falls→Marcus→Boyds→Echo→Arden→

Or put two places side by side: Powell vs Colville

Best time to visitPowell.

September

July

May

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Powell.

The whole year,
without the guesswork.

Nearby, measured,
and named.