United States · 1991–2020

Best time to visit
Mount Oliver.

September leads for comfortable weather in Mount Oliver: typically 24.2°C by day, 13.6°C at night, with 89 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high24.2°C

Typical low13.6°C

Rain in September89 mm

Comfort

September

September · June · May

85climate match

Beach

July

July · August · June

70climate match

Outdoors

October

October · May · September

70climate match

The weakest month is January, scoring 5 against September’s 85 — days reach only 2.5°C, 21° 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

52.5° / -5.4°

Feb

54.5° / -4.3°

Mar

139.9° / -0.2°

Apr

4617.3° / 5.7°

May

7022.5° / 11.3°

Jun

7326.2° / 15.7°

Jul

6428.5° / 18°

Aug

6927.5° / 17.3°

Sep

8524.2° / 13.6°

Oct

5117.4° / 7.6°

Nov

2411.1° / 2.1°

Dec

55° / -2.4°

Monthly climate evidence for Mount Oliver — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	2.5°C	-5.4°C	74 mm	9.2	9 h 35	5	Good coverage
February	4.5°C	-4.3°C	67 mm	9.3	10 h 36	5	Good coverage
March	9.9°C	-0.2°C	80 mm	10.6	11 h 49	13	Good coverage
April	17.3°C	5.7°C	91 mm	11.5	13 h 13	46	Good coverage
May	22.5°C	11.3°C	107 mm	11.6	14 h 24	70	Good coverage
June	26.2°C	15.7°C	121 mm	10.5	15 h 02	73	Good coverage
July	28.5°C	18°C	106 mm	10.1	14 h 47	64	Good coverage
August	27.5°C	17.3°C	102 mm	9.4	13 h 46	69	Good coverage
September	24.2°C	13.6°C	89 mm	8	12 h 25	85	Good coverage
October	17.4°C	7.6°C	87 mm	10.4	11 h 03	51	Good coverage
November	11.1°C	2.1°C	71 mm	8.5	9 h 53	24	Good coverage
December	5°C	-2.4°C	82 mm	9.7	9 h 18	5	Good coverage

Records at PITTSBURGH ALLEGHENY CO AP, 1935–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	23.9°C25 Jan 1950	-26.7°C23 Jan 1936	58 mm5 Jan 2005	184 mm2005 · driest 22 mm in 2026	38
February	25.0°C24 Feb 2017	-22.2°C19 Feb 1936	37 mm6 Feb 2004	164 mm2018 · driest 25 mm in 2026	39
March	28.9°C22 Mar 2026	-17.1°C6 Mar 2015	45 mm17 Mar 1936	173 mm2026 · driest 38 mm in 1947	39
April	30.0°C27 Apr 1938	-9.4°C14 Apr 1950	52 mm2 Apr 2024	153 mm1948 · driest 29 mm in 1946	39
May	33.3°C26 May 1939	-2.1°C9 May 2020	71 mm18 May 1999	166 mm2025 · driest 26 mm in 1936	39
June	37.2°C29 Jun 2012	3.9°C8 Jun 1949	81 mm20 Jun 2018	279 mm2017 · driest 17 mm in 1999	39
July	38.9°C14 Jul 1936	8.3°C2 Jul 2001	64 mm28 Jul 2017	206 mm2013 · driest 36 mm in 1999	40
August	37.2°C27 Aug 1948	7.8°C31 Aug 1935	108 mm6 Aug 2000	192 mm2007 · driest 14 mm in 1951	39
September	35.6°C13 Sep 1952	1.7°C18 Sep 1937	152 mm17 Sep 2004	302 mm2018 · driest 12 mm in 1952	39
October	31.7°C3 Oct 2019	-2.8°C16 Oct 1937	50 mm7 Oct 2019	162 mm2019 · driest 21 mm in 2024	38
November	26.7°C1 Nov 1950	-13.9°C25 Nov 1950	64 mm19 Nov 2003	185 mm1950 · driest 18 mm in 2012	38
December	22.8°C5 Dec 2001	-20.6°C26 Dec 1935	37 mm17 Dec 2001	160 mm2008 · driest 23 mm in 1938	38

Typical days per month at PITTSBURGH ALLEGHENY CO AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	25	2	5
February	<1	0	23	2	3
March	<1	0	17	3	3
April	4	<1	5	3	0
May	12	2	<1	4	0
June	20	6	0	4	0
July	27	11	0	3	0
August	26	7	0	3	0
September	14	4	0	3	0
October	4	<1	2	3	0
November	<1	0	12	2	2
December	0	0	22	3	5

How often, not how much — every day in PITTSBURGH ALLEGHENY CO AP’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	<1%	33%	9%	41%	-1.4–7.2°C
February	1%	33%	8%	43%	0.1–8.4°C
March	9%	36%	9%	49%	6.2–14.5°C
April	25%	38%	9%	53%	13.6–19.1°C
May	46%	37%	12%	48%	20.2–24.6°C
June	65%	33%	12%	42%	25.2–28.0°C
July	69%	31%	11%	36%	26.6–30.6°C
August	72%	28%	10%	30%	26.2–29.3°C
September	65%	25%	8%	28%	22.4–26.1°C
October	32%	30%	9%	35%	15.5–20.8°C
November	6%	30%	7%	34%	7.7–13.6°C
December	<1%	32%	8%	43%	0.7–7.8°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.

1936Each stripe is one year’s mean temperature against the 35-year average. Warmest: 2024. Coolest: 2003.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5202251
NOAA station: USW00014762 · PITTSBURGH ALLEGHENY CO AP
Station distance: 8.7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 21 usable years
Daylight: Calculated from latitude 40.41°, 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 PITTSBURGH ALLEGHENY CO AP is what differs

Mount Lebanon→Bethel Park→Baldwin→Upper Saint Clair→Wilkinsburg→Whitehall→

Or put two places side by side: Mount Oliver vs Mount Lebanon

Best time to visitMount Oliver.