United States · 1991–2020

Best time to visit
Donnelly.

August leads for comfortable weather in Donnelly: typically 26.1°C by day, 14.1°C at night, with 88 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortAugust

Typical high26.1°C

Typical low14.1°C

Rain in August88 mm

Comfort

August

August · June · September

81climate match

Beach

July

July · August · June

61climate match

Outdoors

September

September · May · August

81climate match

The weakest month is January, scoring 5 against August’s 81 — days reach only -7.1°C, 31° 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

5-7.1° / -17.2°

Feb

5-4.7° / -15.3°

Mar

52.4° / -7.4°

Apr

2611.6° / 0.2°

May

6119.7° / 7.6°

Jun

7725.1° / 13.8°

Jul

7327.1° / 15.8°

Aug

8126.1° / 14.1°

Sep

7522.1° / 9°

Oct

3513.6° / 1.7°

Nov

53.9° / -5.9°

Dec

5-3.9° / -13°

Monthly climate evidence for Donnelly — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-7.1°C	-17.2°C	18 mm	4.4	9 h 03	5	Strong coverage
February	-4.7°C	-15.3°C	19 mm	4.4	10 h 17	5	Strong coverage
March	2.4°C	-7.4°C	31 mm	5.2	11 h 46	5	Strong coverage
April	11.6°C	0.2°C	57 mm	6.6	13 h 27	26	Strong coverage
May	19.7°C	7.6°C	79 mm	9.2	14 h 53	61	Strong coverage
June	25.1°C	13.8°C	111 mm	9.9	15 h 41	77	Strong coverage
July	27.1°C	15.8°C	108 mm	8.6	15 h 22	73	Strong coverage
August	26.1°C	14.1°C	88 mm	6.8	14 h 07	81	Strong coverage
September	22.1°C	9°C	69 mm	6.9	12 h 29	75	Strong coverage
October	13.6°C	1.7°C	62 mm	6.8	10 h 51	35	Strong coverage
November	3.9°C	-5.9°C	25 mm	4	9 h 25	5	Strong coverage
December	-3.9°C	-13°C	19 mm	4.4	8 h 42	5	Strong coverage

What has changed

Donnelly runs +0.6°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

+1.9

Feb

-0.1

Mar

+1.3

Apr

-1.5

May

0.0

Jun

+0.9

Jul

-0.2

Aug

-0.7

Sep

+2.4

Oct

-0.1

Nov

+0.9

Dec

+2.3

August daytime highs, 2011–2025. Last recorded: 24.8°C.

Records at MORRIS W CNTRL RSCH & OUTREACH, 1886–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	15.6°C25 Jan 1981	-40.0°C21 Jan 1888	31 mm31 Jan 1926	68 mm1975 · driest 0 mm in 1942	141
February	17.2°C27 Feb 2024	-40.6°C16 Feb 1936	29 mm24 Feb 1977	81 mm1922 · driest 0 mm in 1934	141
March	28.3°C23 Mar 1910	-34.4°C11 Mar 1948	49 mm28 Mar 1940	97 mm1940 · driest 0 mm in 1930	140
April	36.7°C22 Apr 1980	-18.9°C7 Apr 1936	175 mm26 Apr 1954	217 mm1954 · driest 3 mm in 1926	140
May	41.1°C31 May 1934	-7.8°C11 May 1946	93 mm31 May 1959	226 mm1942 · driest 5 mm in 1928	140
June	40.0°C28 Jun 1931	-2.8°C1 Jun 1929	142 mm21 Jun 2013	318 mm1914 · driest 8 mm in 1900	140
July	42.8°C18 Jul 1940	3.3°C3 Jul 1924	123 mm8 Jul 1929	251 mm2016 · driest 9 mm in 1936	139
August	40.0°C10 Aug 1947	-0.6°C30 Aug 1931	110 mm18 Aug 1935	297 mm1899 · driest 4 mm in 1949	140
September	41.1°C10 Sep 1931	-6.7°C30 Sep 1939	79 mm20 Sep 2007	190 mm1921 · driest 1 mm in 2012	137
October	33.9°C2 Oct 2023	-17.2°C29 Oct 1895	91 mm15 Oct 1984	234 mm1984 · driest 0 mm in 1895	139
November	26.7°C5 Nov 2020	-32.8°C28 Nov 1891	49 mm20 Nov 1930	103 mm1930 · driest 0 mm in 2007	140
December	20.6°C6 Dec 1939	-36.7°C29 Dec 1887	27 mm26 Dec 2023	89 mm1968 · driest 0 mm in 1913	140

Typical days per month at MORRIS W CNTRL RSCH & OUTREACH, 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	8
March	0	0	27	<1	5
April	<1	<1	15	2	2
May	7	2	2	3	0
June	17	5	0	4	0
July	24	7	0	3	0
August	20	4	0	3	0
September	10	2	1	2	0
October	2	<1	13	2	<1
November	<1	0	26	<1	4
December	0	0	31	<1	8

The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 84); on 2011–2025 it is September (86). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in MORRIS W CNTRL RSCH & OUTREACH’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%	7%	-12.6–-2.2°C
February	0%	13%	1%	8%	-9.2–0.4°C
March	1%	15%	3%	11%	-2.0–7.2°C
April	15%	22%	7%	24%	8.3–16.3°C
May	41%	27%	8%	32%	17.0–23.4°C
June	61%	31%	11%	38%	22.8–27.7°C
July	74%	25%	9%	24%	25.5–30.3°C
August	73%	23%	8%	23%	24.3–29.1°C
September	53%	21%	7%	20%	19.4–24.7°C
October	22%	18%	5%	16%	11.7–18.0°C
November	1%	13%	3%	9%	-0.1–7.9°C
December	0%	12%	1%	6%	-8.9–0.1°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.

1886Each stripe is one year’s mean temperature against the 135-year average. Warmest: 1931. Coolest: 1917.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5024499
NOAA station: USC00215638 · MORRIS W CNTRL RSCH & OUTREACH
Station distance: 15.5 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 45.69°, 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 MORRIS W CNTRL RSCH & OUTREACH is what differs

Morris→Hancock→Hoffman→Barrett→Cyrus→Alberta→

Or put two places side by side: Donnelly vs Morris

Best time to visitDonnelly.