United States · 1991–2020

Best time to visit
Arno.

May leads for comfortable weather in Arno: typically 26.2°C by day, 13.5°C at night, with 128 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMay

Typical high26.2°C

Typical low13.5°C

Rain in May128 mm

Comfort

May

May · October · September

71climate match

Beach

August

August · September · June

71climate match

Outdoors

October

October · April · November

73climate match

The weakest month is January, scoring 5 against May’s 71 — days reach only 8.6°C, 15° below the 24°C the score treats as ideal, and nights drop to -2.2°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

58.6° / -2.2°

Feb

610.4° / -0.8°

Mar

3716.4° / 3.8°

Apr

6221.9° / 8.2°

May

7126.2° / 13.5°

Jun

5630.8° / 18.1°

Jul

4832° / 20°

Aug

5232.1° / 19.7°

Sep

6928.9° / 15.9°

Oct

7122.7° / 8.8°

Nov

3916.1° / 3.1°

Dec

710.6° / -0.3°

Monthly climate evidence for Arno — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	8.6°C	-2.2°C	111 mm	8.8	9 h 58	5	Good coverage
February	10.4°C	-0.8°C	139 mm	9.6	10 h 50	6	Good coverage
March	16.4°C	3.8°C	120 mm	9.9	11 h 51	37	Good coverage
April	21.9°C	8.2°C	131 mm	9	13 h 03	62	Good coverage
May	26.2°C	13.5°C	128 mm	9.4	14 h 02	71	Good coverage
June	30.8°C	18.1°C	108 mm	9.1	14 h 34	56	Good coverage
July	32°C	20°C	119 mm	8.6	14 h 22	48	Good coverage
August	32.1°C	19.7°C	96 mm	8.1	13 h 31	52	Good coverage
September	28.9°C	15.9°C	106 mm	6.2	12 h 22	69	Good coverage
October	22.7°C	8.8°C	104 mm	7.1	11 h 13	71	Good coverage
November	16.1°C	3.1°C	99 mm	7.7	10 h 13	39	Good coverage
December	10.6°C	-0.3°C	144 mm	9.3	9 h 44	7	Good coverage

Records at THOMPSON STN, 2002–2021
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	23.9°C3 Jan 2006	-19.4°C18 Jan 2003	62 mm23 Jan 2006	196 mm2013 · driest 39 mm in 2018	19
February	25.6°C23 Feb 2018	-16.7°C19 Feb 2015	80 mm16 Feb 2003	333 mm2003 · driest 52 mm in 2009	19
March	30.0°C27 Mar 2007	-12.8°C6 Mar 2015	96 mm28 Mar 2021	315 mm2021 · driest 64 mm in 2003	19
April	33.3°C20 Apr 2006	-7.8°C8 Apr 2007	80 mm29 Apr 2014	238 mm2011 · driest 21 mm in 2016	18
May	34.4°C24 May 2010	0.6°C1 May 2005	201 mm2 May 2010	398 mm2010 · driest 16 mm in 2005	18
June	41.1°C30 Jun 2012	7.8°C2 Jun 2012	114 mm7 Jun 2003	209 mm2019 · driest 36 mm in 2012	18
July	39.4°C7 Jul 2012	11.1°C19 Jul 2009	79 mm20 Jul 2012	191 mm2012 · driest 33 mm in 2011	18
August	41.7°C16 Aug 2007	10.6°C15 Aug 2004	95 mm31 Aug 2017	198 mm2017 · driest 25 mm in 2011	17
September	38.3°C4 Sep 2011	3.3°C29 Sep 2006	179 mm22 Sep 2003	250 mm2003 · driest 12 mm in 2010	18
October	36.1°C3 Oct 2019	-3.9°C29 Oct 2008	104 mm8 Oct 2008	211 mm2014 · driest 3 mm in 2005	18
November	30.0°C1 Nov 2016	-10.0°C22 Nov 2008	63 mm30 Nov 2004	188 mm2004 · driest 27 mm in 2009	18
December	25.0°C12 Dec 2007	-16.1°C14 Dec 2010	89 mm6 Dec 2013	218 mm2004 · driest 69 mm in 2005	19

Typical days per month at THOMPSON STN, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	21	4	1
February	<1	0	17	5	2
March	3	<1	9	4	<1
April	11	<1	2	5	0
May	20	8	0	4	0
June	28	19	0	4	0
July	30	25	0	4	0
August	30	24	0	3	0
September	25	13	0	3	0
October	13	3	2	3	0
November	2	<1	10	3	<1
December	<1	0	18	5	<1

How often, not how much — every day in THOMPSON STN’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%	28%	12%	35%	5.9–11.7°C
February	6%	35%	16%	45%	6.9–13.7°C
March	24%	32%	14%	37%	14.5–19.3°C
April	49%	30%	15%	40%	20.3–24.6°C
May	63%	31%	13%	37%	24.7–28.1°C
June	69%	30%	13%	36%	29.5–31.9°C
July	73%	28%	12%	26%	30.2–33.8°C
August	74%	26%	9%	27%	30.3–34.3°C
September	79%	21%	11%	18%	26.9–30.9°C
October	54%	23%	10%	23%	21.2–24.9°C
November	20%	26%	12%	27%	13.1–18.5°C
December	4%	30%	15%	41%	8.2–13.2°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.

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4603065
NOAA station: USC00408953 · THOMPSON STN
Station distance: 17.7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 17 usable years
Daylight: Calculated from latitude 35.80°, 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 THOMPSON STN is what differs

Spring Hill→Thompson's Station→Bear Wallow→Bethesda→Boston→Burwood→

Or put two places side by side: Arno vs Spring Hill

Best time to visitArno.

May

August

October

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Arno.

The whole year,
without the guesswork.

Nearby, measured,
and named.