United States · 1991–2020

Best time to visit
Calpella.

May leads for comfortable weather in Calpella: typically 24.4°C by day, 8.4°C at night, with 38 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMay

Typical high24.4°C

Typical low8.4°C

Rain in May38 mm

Comfort

May

May · October · June

85climate match

Beach

June

June · July · August

69climate match

Outdoors

May

May · April · October

82climate match

The weakest month is December, scoring 6 against May’s 85 — days reach only 12.9°C, 11° below the 24°C the score treats as ideal, and 234 mm of rain falls.

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

1513.6° / 2.9°

Feb

2315.4° / 3.7°

Mar

4018.2° / 4.5°

Apr

6220.2° / 5.7°

May

8524.4° / 8.4°

Jun

8027.9° / 11.1°

Jul

6832.7° / 13.3°

Aug

6832.4° / 12.4°

Sep

7030.6° / 10.7°

Oct

8424.7° / 7.8°

Nov

4316.9° / 4.9°

Dec

612.9° / 2.7°

Monthly climate evidence for Calpella — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	13.6°C	2.9°C	194 mm	10.8	9 h 41	15	Good coverage
February	15.4°C	3.7°C	186 mm	10.9	10 h 39	23	Good coverage
March	18.2°C	4.5°C	146 mm	9.9	11 h 50	40	Good coverage
April	20.2°C	5.7°C	72 mm	6.8	13 h 10	62	Good coverage
May	24.4°C	8.4°C	38 mm	4.1	14 h 18	85	Good coverage
June	27.9°C	11.1°C	11 mm	1.1	14 h 55	80	Good coverage
July	32.7°C	13.3°C	0 mm	0	14 h 40	68	Good coverage
August	32.4°C	12.4°C	2 mm	0.2	13 h 42	68	Good coverage
September	30.6°C	10.7°C	3 mm	0.5	12 h 24	70	Good coverage
October	24.7°C	7.8°C	42 mm	2.9	11 h 06	84	Good coverage
November	16.9°C	4.9°C	111 mm	7.7	9 h 58	43	Good coverage
December	12.9°C	2.7°C	234 mm	12	9 h 25	6	Good coverage

Records at UKIAH, 1893–2013
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	27.8°C27 Jan 1984	-11.1°C12 Jan 1898	144 mm16 Jan 1974	781 mm1909 · driest 0 mm in 2013	121
February	30.0°C26 Feb 1932	-7.8°C13 Feb 1903	118 mm24 Feb 1958	567 mm1998 · driest 5 mm in 2013	120
March	33.9°C17 Mar 1914	-5.6°C4 Mar 1923	146 mm9 Mar 1995	474 mm1995 · driest 0 mm in 1923	120
April	36.7°C25 Apr 1926	-5.0°C1 Apr 1906	58 mm23 Apr 1983	249 mm2003 · driest 0 mm in 1909	119
May	40.6°C28 May 1984	-2.2°C31 May 1919	54 mm27 May 1990	163 mm1998 · driest 0 mm in 2008	118
June	45.6°C14 Jun 1961	1.7°C1 Jun 1896	33 mm2 Jun 1967	62 mm1936 · driest 0 mm in 1968	118
July	45.6°C14 Jul 1972	3.9°C11 Jul 1898	19 mm8 Jul 1974	21 mm1974 · driest 0 mm in 1947	120
August	45.6°C7 Aug 1908	3.3°C12 Aug 1918	20 mm20 Aug 1997	34 mm1968 · driest 0 mm in 1979	116
September	46.1°C3 Sep 1955	-1.1°C30 Sep 1926	57 mm27 Sep 1957	89 mm1957 · driest 0 mm in 1936	119
October	40.6°C1 Oct 1952	-4.4°C31 Oct 1919	81 mm12 Oct 1962	197 mm1962 · driest 0 mm in 2002	117
November	33.3°C1 Nov 1967	-7.2°C27 Nov 1919	98 mm18 Nov 1920	414 mm1973 · driest 0 mm in 1929	119
December	26.7°C3 Dec 1958	-10.6°C12 Dec 1932	157 mm22 Dec 1964	565 mm2002 · driest 0 mm in 1989	119

Typical days per month at UKIAH, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	10	6
February	<1	0	5	6
March	4	<1	3	5
April	6	1	<1	2
May	14	6	<1	2
June	20	11	0	<1
July	29	23	0	0
August	29	22	0	<1
September	24	17	0	<1
October	14	5	0	2
November	1	0	4	4
December	0	0	10	7

How often, not how much — every day in UKIAH’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	7%	39%	21%	49%	11.6–15.8°C
February	20%	37%	19%	47%	13.3–18.2°C
March	35%	33%	15%	38%	15.4–21.0°C
April	55%	21%	7%	22%	18.4–24.4°C
May	77%	12%	3%	9%	21.9–27.9°C
June	94%	4%	1%	2%	26.4–32.0°C
July	99%	<1%	<1%	0%	31.5–35.9°C
August	99%	1%	<1%	<1%	31.2–35.4°C
September	95%	4%	1%	4%	27.7–33.3°C
October	78%	13%	6%	14%	22.2–27.7°C
November	33%	28%	14%	36%	15.5–20.8°C
December	6%	36%	19%	46%	11.2–15.9°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.

1893Each stripe is one year’s mean temperature against the 106-year average. Warmest: 1934. Coolest: 1893.2011

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5332975
NOAA station: USC00049122 · UKIAH
Station distance: 9.7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 18 usable years
Daylight: Calculated from latitude 39.23°, 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 UKIAH is what differs

Ukiah→Philo→Cape Horn→Coyote Valley Rancheria (historical)→Hendy Grove→Montgomery→

Or put two places side by side: Calpella vs Ukiah

Best time to visitCalpella.

May

June

May

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Calpella.

The whole year,
without the guesswork.

Nearby, measured,
and named.