United States · 1991–2020

Best time to visit
Heppner.

September leads for comfortable weather in Heppner: typically 26.6°C by day, 7.4°C at night, with 35 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high26.6°C

Typical low7.4°C

Rain in September35 mm

Comfort

September

September · June · August

77climate match

Beach

August

August · July · September

66climate match

Outdoors

October

October · September · May

77climate match

The weakest month is January, scoring 5 against September’s 77 — days reach only 4.8°C, 19° below the 24°C the score treats as ideal, and nights drop to -9.9°C.

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

54.8° / -9.9°

Feb

56.4° / -9.2°

Mar

2512.4° / -4.7°

Apr

4216.6° / -0.4°

May

6221.4° / 5.2°

Jun

7127.2° / 10.5°

Jul

6731.5° / 14.1°

Aug

6930.9° / 12.9°

Sep

7726.6° / 7.4°

Oct

5418.3° / 0.7°

Nov

1910.4° / -5.2°

Dec

54.8° / -9.6°

Monthly climate evidence for Heppner — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	4.8°C	-9.9°C	10 mm	2.8	9 h 18	5	Strong coverage
February	6.4°C	-9.2°C	14 mm	3.3	10 h 26	5	Strong coverage
March	12.4°C	-4.7°C	28 mm	4.4	11 h 47	25	Strong coverage
April	16.6°C	-0.4°C	54 mm	6.8	13 h 20	42	Strong coverage
May	21.4°C	5.2°C	82 mm	8.5	14 h 39	62	Strong coverage
June	27.2°C	10.5°C	76 mm	7.7	15 h 22	71	Strong coverage
July	31.5°C	14.1°C	61 mm	6.6	15 h 05	67	Strong coverage
August	30.9°C	12.9°C	51 mm	5.6	13 h 57	69	Strong coverage
September	26.6°C	7.4°C	35 mm	4.1	12 h 27	77	Strong coverage
October	18.3°C	0.7°C	35 mm	4.4	10 h 57	54	Strong coverage
November	10.4°C	-5.2°C	11 mm	2.4	9 h 38	19	Strong coverage
December	4.8°C	-9.6°C	12 mm	2.8	9 h	5	Strong coverage

What has changed

Heppner runs +0.8°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

+1.7

Feb

-1.4

Mar

+2.9

Apr

+0.3

May

-0.9

Jun

+1.0

Jul

+0.2

Aug

+0.2

Sep

+2.5

Oct

-0.2

Nov

+2.0

Dec

+1.7

September daytime highs, 2011–2025. Last recorded: 29.1°C.

Records at HOT SPRINGS, 1894–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	21.7°C27 Jan 2015	-40.6°C11 Jan 1909	28 mm24 Jan 1921	53 mm1921 · driest 0 mm in 1989	121
February	22.2°C21 Feb 1982	-40.6°C11 Feb 1899	20 mm29 Feb 2004	39 mm1932 · driest 0 mm in 1926	122
March	30.6°C26 Mar 2026	-30.0°C21 Mar 1913	51 mm8 Mar 2002	107 mm1932 · driest 2 mm in 1979	121
April	33.9°C28 Apr 1910	-23.9°C2 Apr 1936	110 mm19 Apr 2000	160 mm2000 · driest 2 mm in 1987	121
May	38.9°C29 May 1934	-10.6°C3 May 1954	85 mm23 May 1971	245 mm1935 · driest 2 mm in 1966	120
June	42.2°C18 Jun 1936	-3.3°C2 Jun 1951	89 mm21 Jun 1947	240 mm1947 · driest 8 mm in 1898	121
July	44.4°C10 Jul 1933	2.2°C3 Jul 1915	73 mm29 Jul 1997	205 mm1997 · driest 4 mm in 1936	122
August	43.9°C14 Aug 1937	-2.2°C26 Aug 1910	94 mm8 Aug 2013	175 mm1933 · driest 0 mm in 1898	121
September	39.4°C1 Sep 1940	-10.6°C26 Sep 1926	53 mm5 Sep 1938	132 mm1915 · driest 1 mm in 2012	121
October	34.4°C8 Oct 1935	-21.1°C26 Oct 2020	49 mm4 Oct 2013	124 mm2013 · driest 0 mm in 1999	121
November	26.7°C8 Nov 1999	-29.4°C14 Nov 1959	38 mm4 Nov 1922	114 mm1922 · driest 0 mm in 1943	121
December	22.2°C3 Dec 1941	-38.3°C22 Dec 1989	31 mm11 Dec 1909	43 mm1917 · driest 0 mm in 1912	121

Typical days per month at HOT SPRINGS, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	30	<1	3
February	0	0	27	<1	4
March	1	0	26	<1	2
April	4	<1	17	2	2
May	10	2	5	3	<1
June	21	9	<1	3	0
July	28	20	0	2	0
August	28	19	0	1	0
September	20	10	2	1	0
October	6	1	14	1	<1
November	<1	0	26	<1	1
December	0	0	30	<1	3

How often, not how much — every day in HOT SPRINGS’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	<1%	8%	<1%	2%	-1.5–7.6°C
February	1%	11%	<1%	6%	1.1–10.0°C
March	12%	14%	2%	10%	5.3–14.8°C
April	32%	21%	5%	20%	12.8–19.6°C
May	51%	27%	8%	31%	18.1–24.7°C
June	70%	26%	9%	28%	24.2–30.5°C
July	78%	22%	6%	19%	29.4–34.8°C
August	82%	17%	4%	12%	28.4–33.4°C
September	76%	14%	4%	10%	23.0–29.1°C
October	46%	12%	3%	7%	15.1–21.8°C
November	8%	8%	<1%	3%	6.6–14.0°C
December	<1%	8%	<1%	3%	0.8–7.9°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.

1897Each stripe is one year’s mean temperature against the 115-year average. Warmest: 1934. Coolest: 1899.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5765513
NOAA station: USC00394007 · HOT SPRINGS
Station distance: 22.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 43.25°, 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 HOT SPRINGS is what differs

Hot Springs→Cascade Springs→Erskine→Ivanhoe (historical)→

Or put two places side by side: Heppner vs Hot Springs

Best time to visitHeppner.