United States · 1991–2020

Best time to visit
Grand Canyon.

September leads for comfortable weather in Grand Canyon: typically 25.1°C by day, 6.5°C at night, with 38 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.1°C

Typical low6.5°C

Rain in September38 mm

Comfort

September

September · May · June

79climate match

Beach

July

July · August · June

62climate match

Outdoors

May

May · October · September

80climate match

The weakest month is January, scoring 5 against September’s 79 — days reach only 7.4°C, 17° below the 24°C the score treats as ideal, and nights drop to -7.5°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

57.4° / -7.5°

Feb

88.4° / -6.2°

Mar

2412.3° / -4°

Apr

4616.7° / -1.7°

May

7222.5° / 2.5°

Jun

7028.2° / 6.1°

Jul

6830.3° / 10.4°

Aug

6928.4° / 10°

Sep

7925.1° / 6.5°

Oct

5618.7° / 1.1°

Nov

2611.9° / -4.1°

Dec

56.9° / -7.7°

Monthly climate evidence for Grand Canyon — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	7.4°C	-7.5°C	42 mm	5.8	9 h 57	5	Good coverage
February	8.4°C	-6.2°C	34 mm	5.2	10 h 49	8	Good coverage
March	12.3°C	-4°C	40 mm	5.6	11 h 51	24	Good coverage
April	16.7°C	-1.7°C	16 mm	3	13 h 03	46	Good coverage
May	22.5°C	2.5°C	12 mm	1.9	14 h 03	72	Good coverage
June	28.2°C	6.1°C	6 mm	1.5	14 h 36	70	Good coverage
July	30.3°C	10.4°C	47 mm	4.9	14 h 23	68	Good coverage
August	28.4°C	10°C	58 mm	7.7	13 h 31	69	Good coverage
September	25.1°C	6.5°C	38 mm	4.4	12 h 22	79	Good coverage
October	18.7°C	1.1°C	37 mm	4.1	11 h 12	56	Good coverage
November	11.9°C	-4.1°C	20 mm	3	10 h 12	26	Good coverage
December	6.9°C	-7.7°C	31 mm	5	9 h 43	5	Good coverage

Records at GRAND CANYON NP 2, 1976–2012
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	17.8°C8 Jan 2002	-27.2°C30 Jan 1979	37 mm22 Jan 2010	138 mm1993 · driest 4 mm in 2009	35
February	20.6°C18 Feb 1996	-28.9°C1 Feb 1985	36 mm19 Feb 1990	100 mm1993 · driest 0 mm in 2009	34
March	25.0°C17 Mar 2007	-18.3°C1 Mar 1987	37 mm6 Mar 1995	115 mm1978 · driest 0 mm in 2009	34
April	27.8°C27 Apr 2000	-13.3°C2 Apr 1999	36 mm2 Apr 1986	81 mm1988 · driest 0 mm in 1993	31
May	33.3°C28 May 2003	-8.3°C25 May 1980	37 mm23 May 2007	67 mm1992 · driest 0 mm in 2010	33
June	36.1°C16 Jun 2007	-3.9°C11 Jun 1976	28 mm18 Jun 1988	57 mm1988 · driest 0 mm in 1978	33
July	38.3°C11 Jul 2003	1.7°C1 Jul 1997	80 mm25 Jul 1983	137 mm1999 · driest 0 mm in 1993	34
August	36.1°C21 Aug 2009	1.7°C29 Aug 2006	83 mm13 Aug 2001	135 mm2001 · driest 6 mm in 1976	34
September	33.9°C28 Sep 2001	-4.4°C12 Sep 1985	65 mm19 Sep 2004	120 mm1997 · driest 1 mm in 2010	34
October	31.7°C1 Oct 2011	-13.3°C31 Oct 1991	53 mm27 Oct 2004	135 mm2004 · driest 0 mm in 1989	34
November	23.3°C8 Nov 2006	-21.1°C19 Nov 1985	50 mm11 Nov 1978	134 mm1978 · driest 0 mm in 1976	34
December	18.3°C4 Dec 1979	-28.9°C23 Dec 1990	43 mm12 Dec 2001	99 mm1978 · driest 1 mm in 1976	34

Typical days per month at GRAND CANYON NP 2, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	30	1	4
February	0	0	26	<1	3
March	<1	0	28	1	3
April	<1	0	22	<1	1
May	10	2	9	<1	<1
June	23	12	1	<1	0
July	27	17	0	1	0
August	26	9	0	2	0
September	16	2	1	1	0
October	3	<1	12	1	<1
November	0	0	25	<1	1
December	0	0	29	<1	3

How often, not how much — every day in GRAND CANYON NP 2’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%	21%	5%	22%	4.4–9.9°C
February	<1%	20%	4%	23%	5.4–11.0°C
March	3%	21%	5%	22%	8.6–14.4°C
April	26%	12%	2%	10%	13.8–18.5°C
May	65%	8%	1%	6%	18.8–25.4°C
June	92%	6%	<1%	4%	25.7–30.1°C
July	81%	19%	4%	21%	27.3–32.0°C
August	77%	24%	6%	25%	25.8–29.4°C
September	79%	16%	4%	12%	23.0–26.3°C
October	39%	12%	3%	11%	15.6–20.9°C
November	4%	12%	3%	11%	8.2–14.9°C
December	0%	16%	3%	15%	3.9–10.0°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.

1977Each stripe is one year’s mean temperature against the 26-year average. Warmest: 2003. Coolest: 1987.2010

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5296391
NOAA station: USC00023596 · GRAND CANYON NP 2
Station distance: 1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 18 usable years
Daylight: Calculated from latitude 36.05°, 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 GRAND CANYON NP 2 is what differs

Grand Canyon Village→

Or put two places side by side: Grand Canyon vs Grand Canyon Village

Best time to visitGrand Canyon.

September

July

May

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Grand Canyon.

The whole year,
without the guesswork.

Nearby, measured,
and named.