United States · 1991–2020

Best time to visit
Mountain View.

October leads for comfortable weather in Mountain View: typically 24.5°C by day, 9°C at night, with 22 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortOctober

Typical high24.5°C

Typical low9°C

Rain in October22 mm

Comfort

October

October · May · April

88climate match

Beach

September

September · June · August

73climate match

Outdoors

April

April · October · May

88climate match

The weakest month is January, scoring 29 against October’s 88 — days reach only 13.5°C, 10° below the 24°C the score treats as ideal, and nights drop to 3.4°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

2913.5° / 3.4°

Feb

4116.1° / 4.8°

Mar

5819° / 6.3°

Apr

7821.9° / 7.6°

May

8525.6° / 9.6°

Jun

7529.5° / 11.5°

Jul

7131.4° / 12.2°

Aug

7230.8° / 12.1°

Sep

7729.1° / 11.3°

Oct

8824.5° / 9°

Nov

5918° / 5.8°

Dec

3013.7° / 3°

Monthly climate evidence for Mountain View — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	13.5°C	3.4°C	104 mm	9.1	9 h 48	29	Strong coverage
February	16.1°C	4.8°C	100 mm	8.9	10 h 43	41	Strong coverage
March	19°C	6.3°C	74 mm	8	11 h 50	58	Strong coverage
April	21.9°C	7.6°C	34 mm	4.6	13 h 08	78	Strong coverage
May	25.6°C	9.6°C	16 mm	2.3	14 h 12	85	Strong coverage
June	29.5°C	11.5°C	4 mm	0.6	14 h 47	75	Strong coverage
July	31.4°C	12.2°C	0 mm	0	14 h 33	71	Strong coverage
August	30.8°C	12.1°C	1 mm	0.1	13 h 38	72	Strong coverage
September	29.1°C	11.3°C	2 mm	0.4	12 h 23	77	Strong coverage
October	24.5°C	9°C	22 mm	2.3	11 h 08	88	Strong coverage
November	18°C	5.8°C	53 mm	5.7	10 h 04	59	Strong coverage
December	13.7°C	3°C	102 mm	8.3	9 h 32	30	Strong coverage

What has changed

Mountain View runs -0.0°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

+0.2

Mar

-0.2

Apr

-0.3

May

-1.0

Jun

0.0

Jul

-0.5

Aug

-0.9

Sep

-0.5

Oct

0.0

Nov

—

Dec

+1.4

October daytime highs, 2011–2018. Last recorded: 25.4°C.

Records at MARTINEZ WTP, 1970–2019
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	23.3°C12 Jan 2009	-6.7°C4 Jan 2009	111 mm5 Jan 1982	293 mm2017 · driest 0 mm in 2015	49
February	26.7°C23 Feb 2012	-3.9°C26 Feb 2011	82 mm3 Feb 1998	310 mm1998 · driest 3 mm in 1995	50
March	31.1°C26 Mar 1988	-3.9°C5 Mar 2018	58 mm31 Mar 1982	254 mm1995 · driest 0 mm in 1988	50
April	36.7°C30 Apr 1996	-1.7°C4 Apr 1999	38 mm13 Apr 2003	110 mm2006 · driest 1 mm in 1985	50
May	40.0°C31 May 2001	1.1°C12 May 1976	39 mm16 May 1996	68 mm1998 · driest 0 mm in 2001	50
June	43.3°C19 Jun 1981	4.4°C7 Jun 1970	33 mm16 Jun 1995	64 mm2011 · driest 0 mm in 1998	50
July	46.1°C14 Jul 1972	5.0°C6 Jul 2009	7 mm8 Jul 1974	7 mm1974 · driest 0 mm in 1999	50
August	41.7°C1 Aug 1993	5.6°C23 Aug 1970	17 mm20 Aug 1997	18 mm1983 · driest 0 mm in 2011	50
September	42.2°C14 Sep 1971	4.4°C21 Sep 2007	24 mm30 Sep 1983	31 mm1989 · driest 0 mm in 1996	49
October	39.4°C3 Oct 1980	1.1°C30 Oct 1971	78 mm14 Oct 2009	102 mm2009 · driest 0 mm in 2003	49
November	30.0°C1 Nov 1985	-4.4°C30 Nov 2015	96 mm6 Nov 1994	174 mm1994 · driest 1 mm in 1995	48
December	23.3°C19 Dec 1999	-7.2°C22 Dec 1990	94 mm31 Dec 2005	276 mm2005 · driest 0 mm in 1989	49

Typical days per month at MARTINEZ WTP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	6	3
February	<1	0	2	4
March	2	<1	<1	3
April	7	1	<1	1
May	17	6	0	<1
June	25	14	0	<1
July	30	20	0	0
August	30	19	0	0
September	26	12	0	0
October	14	3	0	<1
November	1	0	1	2
December	0	0	7	4

The best month has moved. On the 1961–1990 numbers the strongest month here was October (scoring 87); on 2011–2025 it is May (84). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in MARTINEZ WTP’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	2%	28%	11%	34%	11.0–14.6°C
February	13%	30%	12%	41%	14.7–17.9°C
March	39%	26%	9%	28%	17.1–21.4°C
April	67%	15%	3%	13%	20.1–24.3°C
May	89%	7%	1%	4%	23.4–28.3°C
June	98%	2%	<1%	0%	27.7–31.2°C
July	100%	<1%	0%	0%	30.0–33.4°C
August	99%	<1%	<1%	<1%	29.6–32.4°C
September	97%	3%	<1%	1%	27.6–31.1°C
October	84%	8%	3%	7%	23.0–26.6°C
November	28%	20%	7%	24%	15.8–19.6°C
December	1%	26%	10%	32%	11.5–15.3°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.

1971Each stripe is one year’s mean temperature against the 46-year average. Warmest: 1997. Coolest: 2011.2017

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5375478
NOAA station: USC00045378 · MARTINEZ WTP
Station distance: 0.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 26 usable years
Daylight: Calculated from latitude 38.01°, 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 MARTINEZ WTP is what differs

Martinez→Benicia→Vine Hill→Avon→Christie→Glen Frazer→

Or put two places side by side: Mountain View vs Martinez

Best time to visitMountain View.