United States · 1991–2020

Best time to visit
Riverview.

May leads for comfortable weather in Riverview: typically 24.7°C by day, 7.8°C at night, with 19 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMay

Typical high24.7°C

Typical low7.8°C

Rain in May19 mm

Comfort

May

May · June · September

84climate match

Beach

June

June · August · July

72climate match

Outdoors

April

April · October · May

86climate match

The weakest month is January, scoring 5 against May’s 84 — days reach only 5.5°C, 18° 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

55.5° / -2°

Feb

199.4° / -2°

Mar

4315° / 0.6°

Apr

6419.6° / 3.5°

May

8424.7° / 7.8°

Jun

7828.6° / 11.5°

Jul

6534° / 14.1°

Aug

6832.9° / 13.4°

Sep

7827.2° / 8.6°

Oct

6118.8° / 3.7°

Nov

2510.3° / -0.2°

Dec

54.9° / -2.7°

Monthly climate evidence for Riverview — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	5.5°C	-2°C	25 mm	6.3	8 h 59	5	Good coverage
February	9.4°C	-2°C	16 mm	4.8	10 h 15	19	Good coverage
March	15°C	0.6°C	17 mm	4.7	11 h 45	43	Good coverage
April	19.6°C	3.5°C	14 mm	4	13 h 29	64	Good coverage
May	24.7°C	7.8°C	19 mm	4.3	14 h 57	84	Good coverage
June	28.6°C	11.5°C	16 mm	3.2	15 h 46	78	Good coverage
July	34°C	14.1°C	3 mm	0.7	15 h 26	65	Good coverage
August	32.9°C	13.4°C	4 mm	1.1	14 h 10	68	Good coverage
September	27.2°C	8.6°C	8 mm	1.7	12 h 29	78	Good coverage
October	18.8°C	3.7°C	16 mm	4.1	10 h 49	61	Good coverage
November	10.3°C	-0.2°C	19 mm	5.3	9 h 21	25	Good coverage
December	4.9°C	-2.7°C	25 mm	6.6	8 h 38	5	Good coverage

Records at PASCO TRI CITIES AP, 1945–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	19.4°C7 Jan 2002	-28.3°C4 Jan 2004	17 mm2 Jan 2009	50 mm2003 · driest 8 mm in 2026	29
February	20.6°C10 Feb 2022	-18.8°C6 Feb 2019	14 mm23 Feb 2002	41 mm2017 · driest 1 mm in 2005	30
March	26.7°C30 Mar 2003	-18.2°C4 Mar 2019	11 mm24 Mar 2017	36 mm2009 · driest 3 mm in 2021	30
April	34.4°C30 Apr 1998	-6.0°C1 Apr 2008	14 mm30 Apr 2022	49 mm2022 · driest 0 mm in 2021	31
May	38.3°C23 May 2001	-2.2°C5 May 1999	19 mm17 May 2025	39 mm2016 · driest 1 mm in 2023	31
June	46.1°C27 Jun 2021	2.8°C7 Jun 2002	28 mm1 Jun 2011	45 mm2012 · driest 0 mm in 2025	30
July	44.4°C29 Jul 2022	5.6°C11 Jul 2008	13 mm16 Jul 2012	15 mm2012 · driest 0 mm in 2018	30
August	43.9°C4 Aug 1998	4.4°C31 Aug 2008	11 mm14 Aug 2014	16 mm2004 · driest 0 mm in 2022	29
September	38.9°C1 Sep 2022	-3.3°C24 Sep 2000	18 mm30 Sep 2005	27 mm2010 · driest 0 mm in 2012	29
October	32.2°C6 Oct 2020	-12.8°C31 Oct 2002	22 mm30 Oct 2016	66 mm2016 · driest 1 mm in 2013	29
November	25.0°C13 Nov 1999	-21.6°C24 Nov 2010	21 mm5 Nov 1998	48 mm1998 · driest 4 mm in 2011	29
December	21.7°C1 Dec 2021	-22.7°C16 Dec 2016	19 mm13 Dec 2003	55 mm2024 · driest 3 mm in 2011	29

Typical days per month at PASCO TRI CITIES AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	21	<1	2
February	0	0	20	<1	1
March	<1	0	15	0	0
April	4	<1	6	<1	0
May	14	5	2	<1	0
June	24	12	0	<1	0
July	30	26	0	<1	0
August	30	25	0	0	0
September	21	8	<1	<1	0
October	3	<1	8	<1	0
November	0	0	17	<1	<1
December	0	0	23	<1	2

How often, not how much — every day in PASCO TRI CITIES 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	0%	20%	<1%	18%	3.0–8.7°C
February	<1%	17%	<1%	16%	5.8–11.7°C
March	11%	15%	<1%	10%	13.3–17.0°C
April	43%	12%	<1%	6%	17.8–21.4°C
May	78%	13%	1%	9%	22.4–26.8°C
June	90%	10%	1%	4%	26.6–30.6°C
July	98%	2%	<1%	0%	32.2–36.1°C
August	96%	4%	<1%	1%	31.9–34.0°C
September	91%	6%	<1%	2%	26.0–29.1°C
October	40%	14%	<1%	12%	17.7–21.4°C
November	3%	19%	<1%	16%	8.6–12.4°C
December	<1%	22%	1%	23%	2.3–7.1°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.

1999Each stripe is one year’s mean temperature against the 27-year average. Warmest: 2021. Coolest: 2008.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5808437
NOAA station: USW00024163 · PASCO TRI CITIES AP
Station distance: 3.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 22 usable years
Daylight: Calculated from latitude 46.24°, 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 PASCO TRI CITIES AP is what differs

Tri-Cities→West Pasco→Riverview→

Or put two places side by side: Riverview vs Tri-Cities

Best time to visitRiverview.

May

June

April

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Riverview.

The whole year,
without the guesswork.

Nearby, measured,
and named.