United States · 1991–2020

Best time to visit
Summit Park.

July leads for comfortable weather in Summit Park: typically 25.7°C by day, 12.7°C at night, with 21 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high25.7°C

Typical low12.7°C

Rain in July21 mm

Comfort

July

July · August · June

90climate match

Beach

July

July · August · June

67climate match

Outdoors

June

June · September · August

95climate match

The weakest month is January, scoring 5 against July’s 90 — days reach only 0.2°C, 24° below the 24°C the score treats as ideal.

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

50.2° / -8.3°

Feb

51.2° / -8.2°

Mar

56° / -4.6°

Apr

58.9° / -2.1°

May

3513.7° / 2.6°

Jun

7219.9° / 7.6°

Jul

9025.7° / 12.7°

Aug

8925.1° / 12.1°

Sep

6619.5° / 7.4°

Oct

2311.4° / 1°

Nov

54.7° / -4.3°

Dec

5-0.8° / -8.9°

Monthly climate evidence for Summit Park — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	0.2°C	-8.3°C	100 mm	12.5	9 h 33	5	Good coverage
February	1.2°C	-8.2°C	88 mm	11.7	10 h 35	5	Good coverage
March	6°C	-4.6°C	92 mm	11.5	11 h 49	5	Good coverage
April	8.9°C	-2.1°C	102 mm	11.3	13 h 14	5	Good coverage
May	13.7°C	2.6°C	69 mm	8.1	14 h 26	35	Good coverage
June	19.9°C	7.6°C	35 mm	3.9	15 h 05	72	Good coverage
July	25.7°C	12.7°C	21 mm	3.2	14 h 49	90	Good coverage
August	25.1°C	12.1°C	29 mm	5.3	13 h 47	89	Good coverage
September	19.5°C	7.4°C	51 mm	6.1	12 h 25	66	Good coverage
October	11.4°C	1°C	72 mm	8.6	11 h 03	23	Good coverage
November	4.7°C	-4.3°C	87 mm	10.8	9 h 51	5	Good coverage
December	-0.8°C	-8.9°C	98 mm	12.3	9 h 16	5	Good coverage

Records at Parley's Summit, 2003–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	18.4°C20 Jan 2005	-23.9°C13 Jan 2013	51 mm5 Jan 2022	173 mm2023 · driest 38 mm in 2007	23
February	14.4°C14 Feb 2015	-26.9°C1 Feb 2011	51 mm7 Feb 2011	142 mm2024 · driest 25 mm in 2022	23
March	22.3°C25 Mar 2026	-18.0°C2 Mar 2007	38 mm25 Mar 2009	256 mm2023 · driest 28 mm in 2015	23
April	24.2°C23 Apr 2012	-13.9°C1 Apr 2008	38 mm3 Apr 2023	221 mm2011 · driest 28 mm in 2020	23
May	28.2°C29 May 2003	-8.4°C1 May 2008	38 mm6 May 2024	132 mm2011 · driest 20 mm in 2020	24
June	31.4°C28 Jun 2013	-6.1°C6 Jun 2007	48 mm6 Jun 2007	94 mm2009 · driest 0 mm in 2013	24
July	33.6°C12 Jul 2026	2.1°C11 Jul 2016	33 mm28 Jul 2014	81 mm2015 · driest 0 mm in 2008	24
August	32.2°C14 Aug 2003	0.6°C31 Aug 2005	46 mm31 Aug 2008	137 mm2021 · driest 5 mm in 2019	23
September	31.7°C7 Sep 2022	-4.8°C30 Sep 2007	51 mm27 Sep 2014	127 mm2017 · driest 5 mm in 2020	23
October	25.9°C1 Oct 2010	-20.4°C29 Oct 2019	41 mm4 Oct 2025	160 mm2004 · driest 8 mm in 2014	23
November	19.2°C7 Nov 2004	-20.4°C25 Nov 2010	46 mm17 Nov 2017	124 mm2003 · driest 28 mm in 2007	23
December	13.9°C12 Dec 2004	-25.2°C31 Dec 2014	56 mm29 Dec 2010	216 mm2010 · driest 15 mm in 2011	23

Typical days per month at Parley's Summit, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	30	4
February	0	0	27	4
March	0	0	26	4
April	0	0	20	5
May	<1	0	9	3
June	5	<1	2	1
July	20	2	0	<1
August	18	1	0	<1
September	4	0	2	2
October	<1	0	13	3
November	0	0	23	3
December	0	0	30	4

How often, not how much — every day in Parley's Summit’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%	37%	12%	48%	-2.8–2.2°C
February	0%	40%	12%	55%	-0.7–4.2°C
March	1%	40%	13%	55%	3.1–9.2°C
April	1%	33%	12%	40%	6.7–10.8°C
May	18%	25%	9%	29%	10.8–15.8°C
June	57%	12%	4%	10%	17.8–23.2°C
July	86%	11%	2%	8%	24.2–28.0°C
August	78%	18%	4%	16%	23.6–26.5°C
September	50%	21%	7%	24%	18.0–21.7°C
October	8%	28%	9%	33%	8.3–14.5°C
November	0%	35%	12%	48%	2.1–7.5°C
December	0%	37%	12%	48%	-3.0–2.6°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.

2005Each stripe is one year’s mean temperature against the 21-year average. Warmest: 2025. Coolest: 2007.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5782272
NOAA station: USS0011J52S · Parley's Summit
Station distance: 2.2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 17 usable years
Daylight: Calculated from latitude 40.75°, 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 Parley's Summit is what differs

Altus→Lost Acres→

Or put two places side by side: Summit Park vs Altus

Best time to visitSummit Park.

July

July

June

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Summit Park.

The whole year,
without the guesswork.

Nearby, measured,
and named.