United States · 1991–2020

Best time to visit
San Jose.

October leads for comfortable weather in San Jose: typically 24.1°C by day, 11.5°C at night, with 14 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortOctober

Typical high24.1°C

Typical low11.5°C

Rain in October14 mm

Comfort

October

October · May · June

93climate match

Beach

August

August · July · September

77climate match

Outdoors

April

April · November · May

95climate match

The weakest month is January, scoring 48 against October’s 93 — days reach only 15.4°C, 9° below the 24°C the score treats as ideal, and nights drop to 5.5°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

4815.4° / 5.5°

Feb

5316.9° / 6.5°

Mar

6418.9° / 7.9°

Apr

7720.6° / 9.1°

May

9123.1° / 11.3°

Jun

9026.1° / 13.3°

Jul

8927.1° / 14.6°

Aug

8927.2° / 14.9°

Sep

8827.1° / 14.1°

Oct

9324.1° / 11.5°

Nov

6818.9° / 7.8°

Dec

4815.3° / 5.5°

Monthly climate evidence for San Jose — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 43 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	15.4°C	5.5°C	57 mm	6.7	12.2°C	9 h 51	48	Good coverage
February	16.9°C	6.5°C	62 mm	7.4	12.3°C	10 h 45	53	Good coverage
March	18.9°C	7.9°C	47 mm	7.6	12.3°C	11 h 51	64	Good coverage
April	20.6°C	9.1°C	28 mm	4.7	12.0°C	13 h 06	77	Good coverage
May	23.1°C	11.3°C	7 mm	1.5	12.2°C	14 h 09	91	Good coverage
June	26.1°C	13.3°C	3 mm	0.5	12.9°C	14 h 43	90	Good coverage
July	27.1°C	14.6°C	0 mm	0	14.1°C	14 h 30	89	Good coverage
August	27.2°C	14.9°C	0 mm	0	14.9°C	13 h 36	89	Good coverage
September	27.1°C	14.1°C	2 mm	0.3	14.9°C	12 h 23	88	Good coverage
October	24.1°C	11.5°C	14 mm	2	14.2°C	11 h 10	93	Good coverage
November	18.9°C	7.8°C	31 mm	5	13.4°C	10 h 07	68	Good coverage
December	15.3°C	5.5°C	55 mm	7.1	12.5°C	9 h 36	48	Good coverage

Records at SAN JOSE, 1998–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	25.6°C18 Jan 2021	-3.3°C13 Jan 2013	45 mm24 Jan 2000	143 mm2008 · driest 0 mm in 2022	28
February	27.2°C12 Feb 2022	-0.6°C11 Feb 1999	48 mm20 Feb 2017	142 mm2019 · driest 0 mm in 2020	28
March	31.7°C14 Mar 2015	1.1°C10 Mar 2009	31 mm5 Mar 2016	116 mm2006 · driest 1 mm in 2026	28
April	35.0°C20 Apr 2009	2.2°C9 Apr 1999	21 mm12 Apr 2012	76 mm2010 · driest 1 mm in 2008	28
May	37.2°C30 May 2001	5.0°C10 May 2022	17 mm4 May 2024	37 mm2019 · driest 0 mm in 2022	28
June	41.1°C14 Jun 2000	7.2°C8 Jun 1999	22 mm4 Jun 2011	39 mm2011 · driest 0 mm in 2025	28
July	40.0°C23 Jul 2006	10.0°C4 Jul 1999	1 mm31 Jul 2000	1 mm2000 · driest 0 mm in 2020	29
August	39.4°C14 Aug 2020	10.6°C15 Aug 1999	2 mm3 Aug 1999	2 mm1999 · driest 0 mm in 2008	28
September	42.8°C6 Sep 2022	7.8°C30 Sep 2009	17 mm21 Sep 2013	17 mm2013 · driest 0 mm in 2002	28
October	41.1°C2 Oct 2024	5.0°C31 Oct 2002	59 mm13 Oct 2009	61 mm2009 · driest 0 mm in 2013	28
November	29.4°C4 Nov 2010	-0.5°C28 Nov 2015	31 mm8 Nov 2022	66 mm2012 · driest 3 mm in 2021	28
December	23.9°C20 Dec 1999	-4.4°C24 Dec 1998	82 mm11 Dec 2014	197 mm2014 · driest 2 mm in 2017	28

Typical days per month at SAN JOSE, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	1	2
February	<1	0	<1	2
March	3	<1	0	2
April	5	1	0	<1
May	9	3	0	<1
June	17	6	0	<1
July	24	6	0	0
August	24	6	0	0
September	20	8	0	0
October	13	3	0	<1
November	2	0	<1	1
December	0	0	1	2

How often, not how much — every day in SAN JOSE’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	10%	21%	7%	24%	13.8–17.3°C
February	21%	25%	7%	35%	15.1–19.5°C
March	37%	25%	5%	27%	16.7–21.4°C
April	54%	14%	2%	13%	18.5–22.3°C
May	80%	5%	<1%	2%	21.0–24.9°C
June	98%	1%	<1%	0%	24.5–27.7°C
July	100%	<1%	0%	0%	25.8–28.6°C
August	100%	<1%	0%	0%	26.1–29.0°C
September	98%	1%	<1%	<1%	25.6–28.6°C
October	87%	6%	2%	4%	22.5–26.6°C
November	37%	16%	4%	15%	17.1–20.4°C
December	6%	23%	7%	28%	14.2–17.1°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.

1999Each stripe is one year’s mean temperature against the 26-year average. Warmest: 2024. Coolest: 1999.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5392171
NOAA station: USW00023293 · SAN JOSE
Station distance: 3.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 22 usable years
Daylight: Calculated from latitude 37.34°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 43 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
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 SAN JOSE is what differs

Santa Clara→Milpitas→Alum Rock→Communications Hill→East Foothills→Seven Trees→

Or put two places side by side: San Jose vs Santa Clara

Best time to visitSan Jose.