United States · 1991–2020

Best time to visit
Summerlin South.

October leads for comfortable weather in Summerlin South: typically 24.4°C by day, 8.8°C at night, with 17 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortOctober

Typical high24.4°C

Typical low8.8°C

Rain in October17 mm

Comfort

October

October · May · April

88climate match

Beach

August

August · June · July

81climate match

Outdoors

April

April · March · October

90climate match

The weakest month is December, scoring 29 against October’s 88 — days reach only 11.4°C, 13° below the 24°C the score treats as ideal, and nights drop to -1.5°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

3011.9° / -1.3°

Feb

3614° / 0.5°

Mar

6118.3° / 3.9°

Apr

7821.6° / 7°

May

8526.9° / 12°

Jun

6632.6° / 17.8°

Jul

4935.7° / 21.6°

Aug

5434.9° / 20.7°

Sep

7631.2° / 15.3°

Oct

8824.4° / 8.8°

Nov

5216.7° / 1.9°

Dec

2911.4° / -1.5°

Monthly climate evidence for Summerlin South — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	11.9°C	-1.3°C	40 mm	3.5	9 h 57	30	Strong coverage
February	14°C	0.5°C	60 mm	4.8	10 h 49	36	Strong coverage
March	18.3°C	3.9°C	30 mm	3.1	11 h 51	61	Strong coverage
April	21.6°C	7°C	14 mm	1.7	13 h 03	78	Strong coverage
May	26.9°C	12°C	5 mm	1	14 h 04	85	Strong coverage
June	32.6°C	17.8°C	3 mm	0.6	14 h 36	66	Strong coverage
July	35.7°C	21.6°C	20 mm	2	14 h 23	49	Strong coverage
August	34.9°C	20.7°C	16 mm	1.8	13 h 32	54	Strong coverage
September	31.2°C	15.3°C	17 mm	1.5	12 h 22	76	Good coverage
October	24.4°C	8.8°C	17 mm	1.6	11 h 12	88	Strong coverage
November	16.7°C	1.9°C	14 mm	1.7	10 h 12	52	Strong coverage
December	11.4°C	-1.5°C	28 mm	2.5	9 h 43	29	Strong coverage

Records at RED ROCK CANYON - SPG MT RCH S, 1977–2017
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	21.7°C21 Jan 1981	-12.8°C13 Jan 2007	50 mm29 Jan 1980	188 mm2005 · driest 0 mm in 2013	39
February	27.2°C26 Feb 1986	-12.8°C1 Feb 1985	66 mm24 Feb 1998	186 mm1998 · driest 0 mm in 2013	39
March	30.0°C22 Mar 2004	-6.1°C3 Mar 2002	137 mm10 Mar 1986	180 mm1992 · driest 0 mm in 2017	38
April	35.0°C23 Apr 2012	-4.4°C10 Apr 1999	38 mm16 Apr 1978	82 mm1978 · driest 0 mm in 1997	39
May	39.4°C29 May 2003	-2.2°C6 May 1988	20 mm13 May 1998	37 mm1998 · driest 0 mm in 2017	40
June	45.6°C30 Jun 1977	1.7°C8 Jun 2009	13 mm6 Jun 1993	22 mm1998 · driest 0 mm in 2003	39
July	43.9°C6 Jul 1985	7.2°C4 Jul 1979	54 mm20 Jul 1985	91 mm1984 · driest 0 mm in 1993	39
August	46.7°C24 Aug 1985	7.2°C16 Aug 1979	93 mm18 Aug 1983	228 mm1983 · driest 0 mm in 2006	39
September	38.9°C1 Sep 1985	0.0°C23 Sep 1977	33 mm8 Sep 2014	90 mm1997 · driest 0 mm in 1995	38
October	36.1°C2 Oct 1980	-3.3°C18 Oct 1984	35 mm19 Oct 2005	71 mm2005 · driest 0 mm in 2007	39
November	27.8°C7 Nov 1978	-8.9°C26 Nov 1993	37 mm22 Nov 1996	67 mm1984 · driest 0 mm in 2000	39
December	22.8°C17 Dec 1980	-16.1°C23 Dec 1990	76 mm5 Dec 1992	104 mm1992 · driest 0 mm in 1989	39

Typical days per month at RED ROCK CANYON - SPG MT RCH S, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	19	1
February	0	0	12	2
March	2	0	5	1
April	8	1	1	<1
May	20	9	0	<1
June	27	22	0	0
July	29	28	0	<1
August	29	28	0	<1
September	27	20	0	<1
October	14	4	<1	<1
November	1	0	9	<1
December	0	0	19	<1

How often, not how much — every day in RED ROCK CANYON - SPG MT RCH S’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%	12%	5%	10%	9.7–14.3°C
February	12%	16%	7%	18%	11.2–16.9°C
March	38%	14%	5%	12%	15.3–21.1°C
April	66%	6%	2%	4%	19.1–24.3°C
May	89%	4%	<1%	<1%	23.5–29.7°C
June	98%	2%	<1%	1%	30.6–34.9°C
July	93%	7%	3%	4%	33.8–37.6°C
August	92%	8%	2%	5%	32.7–36.7°C
September	94%	5%	2%	3%	29.4–32.7°C
October	81%	5%	2%	3%	21.9–27.0°C
November	29%	6%	2%	3%	13.9–19.7°C
December	3%	7%	3%	3%	9.4–14.5°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.

1979Each stripe is one year’s mean temperature against the 26-year average. Warmest: 1981. Coolest: 1998.2015

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 7262622
NOAA station: USC00266691 · RED ROCK CANYON - SPG MT RCH S
Station distance: 12.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 24 usable years
Daylight: Calculated from latitude 36.12°, 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 RED ROCK CANYON - SPG MT RCH S is what differs

Blue Diamond→Bonnie Springs→

Or put two places side by side: Summerlin South vs Blue Diamond

Best time to visitSummerlin South.