United States · 1991–2020

Best time to visit
Arabia.

September leads for comfortable weather in Arabia: typically 26.6°C by day, 11.5°C at night, with 99 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high26.6°C

Typical low11.5°C

Rain in September99 mm

Comfort

September

September · May · June

72climate match

Beach

August

August · June · July

67climate match

Outdoors

October

October · April · May

76climate match

The weakest month is January, scoring 5 against September’s 72 — days reach only 5.4°C, 19° below the 24°C the score treats as ideal, and nights drop to -6.4°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

55.4° / -6.4°

Feb

57.5° / -5.3°

Mar

1712.9° / -1.5°

Apr

4919.7° / 3.4°

May

6924.3° / 9.4°

Jun

6728.4° / 14.4°

Jul

5530.2° / 16.6°

Aug

6729.8° / 15.6°

Sep

7226.6° / 11.5°

Oct

5720.1° / 4.7°

Nov

2413.3° / -1.2°

Dec

57.6° / -3.8°

Monthly climate evidence for Arabia — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	5.4°C	-6.4°C	79 mm	9.8	9 h 44	5	Strong coverage
February	7.5°C	-5.3°C	85 mm	9.7	10 h 41	5	Strong coverage
March	12.9°C	-1.5°C	107 mm	10.7	11 h 50	17	Strong coverage
April	19.7°C	3.4°C	98 mm	10.5	13 h 09	49	Strong coverage
May	24.3°C	9.4°C	125 mm	11.6	14 h 15	69	Strong coverage
June	28.4°C	14.4°C	111 mm	10.4	14 h 51	67	Strong coverage
July	30.2°C	16.6°C	141 mm	10.2	14 h 37	55	Strong coverage
August	29.8°C	15.6°C	93 mm	8.4	13 h 40	67	Good coverage
September	26.6°C	11.5°C	99 mm	8	12 h 23	72	Strong coverage
October	20.1°C	4.7°C	84 mm	8.1	11 h 07	57	Strong coverage
November	13.3°C	-1.2°C	77 mm	8.9	10 h 01	24	Strong coverage
December	7.6°C	-3.8°C	101 mm	10.3	9 h 29	5	Strong coverage

Records at WATERLOO, 1995–2021
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	25.0°C23 Jan 1999	-25.0°C29 Jan 2014	72 mm24 Jan 2002	155 mm1996 · driest 26 mm in 2016	26
February	26.7°C21 Feb 2018	-32.2°C21 Feb 2015	58 mm19 Feb 2000	187 mm2018 · driest 22 mm in 2002	26
March	30.6°C22 Mar 2012	-21.7°C7 Mar 2015	84 mm2 Mar 1997	239 mm1997 · driest 34 mm in 2003	26
April	32.2°C7 Apr 2010	-7.8°C4 Apr 2013	50 mm22 Apr 2002	266 mm2011 · driest 26 mm in 2007	26
May	34.4°C31 May 2011	-3.9°C8 May 2007	122 mm3 May 2010	234 mm2011 · driest 15 mm in 2007	26
June	40.0°C30 Jun 2012	2.8°C10 Jun 1997	89 mm5 Jun 2008	231 mm1998 · driest 24 mm in 2005	26
July	38.9°C9 Jul 2012	8.3°C5 Jul 2014	104 mm31 Jul 1996	254 mm2000 · driest 69 mm in 2019	26
August	38.9°C17 Aug 2007	7.8°C31 Aug 1999	91 mm25 Aug 1999	192 mm2003 · driest 23 mm in 2012	25
September	37.8°C4 Sep 2011	1.1°C30 Sep 2003	97 mm9 Sep 2004	269 mm2018 · driest 15 mm in 1998	26
October	35.0°C3 Oct 2019	-7.2°C23 Oct 1997	53 mm20 Oct 2006	184 mm2006 · driest 31 mm in 2000	26
November	28.3°C5 Nov 2003	-13.9°C22 Nov 2008	47 mm8 Nov 1996	164 mm2011 · driest 18 mm in 2012	25
December	25.0°C6 Dec 2001	-17.8°C20 Dec 2004	66 mm17 Dec 2019	191 mm2019 · driest 44 mm in 2006	26

Typical days per month at WATERLOO, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	26	3	4
February	<1	0	24	3	3
March	2	<1	20	4	1
April	7	<1	9	3	<1
May	15	5	1	4	0
June	25	12	0	4	0
July	28	16	0	5	0
August	28	15	0	3	0
September	19	8	0	3	0
October	8	<1	6	3	0
November	<1	0	19	3	<1
December	0	0	23	4	2

How often, not how much — every day in WATERLOO’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%	29%	8%	33%	1.9–8.1°C
February	2%	31%	9%	37%	2.4–10.8°C
March	11%	32%	12%	43%	9.7–16.2°C
April	33%	34%	12%	47%	17.4–22.1°C
May	52%	35%	14%	46%	21.8–26.6°C
June	64%	31%	13%	38%	27.1–29.8°C
July	67%	32%	15%	35%	28.5–32.1°C
August	72%	27%	12%	30%	27.9–31.6°C
September	69%	25%	11%	25%	24.6–29.1°C
October	41%	25%	9%	29%	18.3–22.3°C
November	13%	28%	10%	32%	9.8–16.2°C
December	2%	30%	11%	38%	4.3–10.8°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.

1996Each stripe is one year’s mean temperature against the 24-year average. Warmest: 1998. Coolest: 2008.2020

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4505381
NOAA station: USC00338810 · WATERLOO
Station distance: 4.7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 24 usable years
Daylight: Calculated from latitude 38.66°, 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 WATERLOO is what differs

Oak Hill→Thurman→Aid→Bald Knob→Bartles→Blackfork→

Or put two places side by side: Arabia vs Oak Hill

Best time to visitArabia.