United States · 1991–2020

Best time to visit
Rillito.

November leads for comfortable weather in Rillito: typically 24.2°C by day, 8.5°C at night, with 15 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortNovember

Typical high24.2°C

Typical low8.5°C

Rain in November15 mm

Comfort

November

November · March · April

88climate match

Beach

September

September · October · April

77climate match

Outdoors

February

February · January · December

90climate match

The weakest month is July, scoring 32 against November’s 88 — days average 38.6°C, 15° above 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

6619.3° / 4.8°

Feb

7321° / 5.7°

Mar

8724.4° / 8.3°

Apr

7828.7° / 11.4°

May

6933.4° / 15°

Jun

4138.8° / 20.8°

Jul

3238.6° / 23.5°

Aug

3537.5° / 22.6°

Sep

5135.8° / 20.2°

Oct

7730.8° / 14.5°

Nov

8824.2° / 8.5°

Dec

6419° / 4.5°

Monthly climate evidence for Rillito — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	19.3°C	4.8°C	25 mm	3.1	10 h 14	66	Strong coverage
February	21°C	5.7°C	25 mm	3.1	10 h 59	73	Strong coverage
March	24.4°C	8.3°C	17 mm	2.5	11 h 53	87	Strong coverage
April	28.7°C	11.4°C	6 mm	1.1	12 h 56	78	Strong coverage
May	33.4°C	15°C	4 mm	1	13 h 48	69	Strong coverage
June	38.8°C	20.8°C	8 mm	1	14 h 16	41	Strong coverage
July	38.6°C	23.5°C	51 mm	5.7	14 h 05	32	Strong coverage
August	37.5°C	22.6°C	63 mm	6	13 h 20	35	Strong coverage
September	35.8°C	20.2°C	30 mm	3.4	12 h 20	51	Strong coverage
October	30.8°C	14.5°C	17 mm	2.4	11 h 19	77	Strong coverage
November	24.2°C	8.5°C	15 mm	1.9	10 h 27	88	Strong coverage
December	19°C	4.5°C	25 mm	3.3	10 h 02	64	Strong coverage

Records at TUCSON 17 NW, 1982–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	30.6°C16 Jan 2000	-9.4°C14 Jan 2013	38 mm8 Jan 1993	136 mm1993 · driest 0 mm in 2003	41
February	32.2°C24 Feb 2009	-7.2°C5 Feb 2008	27 mm8 Feb 1994	81 mm2019 · driest 0 mm in 2002	41
March	38.9°C20 Mar 2026	-3.3°C23 Mar 1984	46 mm7 Mar 2000	63 mm1983 · driest 0 mm in 1984	41
April	40.0°C21 Apr 1989	-2.8°C29 Apr 1984	38 mm16 Apr 1988	47 mm1988 · driest 0 mm in 2002	40
May	42.2°C28 May 1983	0.6°C12 May 2014	11 mm5 May 2026	27 mm1992 · driest 0 mm in 1991	42
June	46.7°C22 Jun 2017	4.4°C14 Jun 2017	44 mm27 Jun 2008	72 mm1984 · driest 0 mm in 2023	42
July	45.6°C29 Jul 1995	10.0°C22 Jul 2007	48 mm24 Jul 2007	132 mm2006 · driest 1 mm in 1995	43
August	45.0°C8 Aug 2025	8.9°C25 Aug 2013	62 mm24 Aug 1992	171 mm1986 · driest 11 mm in 2002	42
September	42.8°C1 Sep 2011	7.2°C15 Sep 2016	87 mm11 Sep 1982	128 mm1982 · driest 0 mm in 1986	43
October	41.1°C1 Oct 2010	1.7°C29 Oct 2009	55 mm2 Oct 1983	114 mm1983 · driest 0 mm in 2021	41
November	35.0°C7 Nov 1999	-3.3°C30 Nov 2004	40 mm23 Nov 2013	62 mm2013 · driest 0 mm in 1999	40
December	31.1°C1 Dec 1999	-6.1°C6 Dec 2011	52 mm1 Dec 2007	111 mm2007 · driest 0 mm in 1999	39

Typical days per month at TUCSON 17 NW, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	3	0	3	<1
February	6	<1	2	<1
March	15	4	<1	<1
April	21	13	<1	<1
May	27	23	0	<1
June	28	28	0	<1
July	29	29	0	2
August	29	29	0	2
September	28	27	0	1
October	26	18	0	<1
November	14	4	<1	<1
December	3	0	4	<1

How often, not how much — every day in TUCSON 17 NW’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	46%	10%	3%	10%	17.1–22.1°C
February	57%	11%	3%	8%	18.2–23.4°C
March	78%	8%	2%	5%	21.8–27.0°C
April	92%	4%	<1%	1%	26.2–31.1°C
May	97%	3%	<1%	2%	31.7–35.6°C
June	97%	3%	1%	2%	37.2–40.4°C
July	80%	20%	6%	21%	37.0–39.9°C
August	78%	22%	8%	19%	35.7–39.3°C
September	88%	12%	3%	8%	34.2–37.2°C
October	91%	8%	2%	5%	28.0–33.0°C
November	75%	7%	2%	3%	21.5–26.9°C
December	44%	12%	3%	8%	16.8–21.3°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.

1983Each stripe is one year’s mean temperature against the 25-year average. Warmest: 1989. Coolest: 1983.2023

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5311323
NOAA station: USC00028795 · TUCSON 17 NW
Station distance: 18.2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 25 usable years
Daylight: Calculated from latitude 32.41°, 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 TUCSON 17 NW is what differs

Marana→Picture Rocks→Avra Valley→Nelson→Skoksonak→Avra→

Or put two places side by side: Rillito vs Marana

Best time to visitRillito.