United States · 1991–2020

Best time to visit
Alger.

September leads for comfortable weather in Alger: typically 27°C by day, 12.7°C at night, with 108 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high27°C

Typical low12.7°C

Rain in September108 mm

Comfort

September

September · May · June

72climate match

Beach

August

August · July · June

67climate match

Outdoors

October

October · April · May

75climate match

The weakest month is January, scoring 5 against September’s 72 — days reach only 6.4°C, 18° below the 24°C the score treats as ideal, and nights drop to -5.5°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

56.4° / -5.5°

Feb

58.8° / -4.3°

Mar

2414.9° / -0.7°

Apr

5321.2° / 4°

May

6625° / 9.9°

Jun

6428.6° / 14.6°

Jul

5429.8° / 17.3°

Aug

6429.6° / 16.4°

Sep

7227° / 12.7°

Oct

6221.1° / 5.6°

Nov

3114.8° / -0.4°

Dec

58.8° / -3.2°

Monthly climate evidence for Alger — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	6.4°C	-5.5°C	99 mm	9.5	9 h 51	5	Good coverage
February	8.8°C	-4.3°C	96 mm	9.2	10 h 45	5	Good coverage
March	14.9°C	-0.7°C	116 mm	10.1	11 h 51	24	Good coverage
April	21.2°C	4°C	118 mm	10	13 h 06	53	Good coverage
May	25°C	9.9°C	143 mm	10.7	14 h 09	66	Good coverage
June	28.6°C	14.6°C	130 mm	10.4	14 h 43	64	Good coverage
July	29.8°C	17.3°C	149 mm	10.1	14 h 30	54	Good coverage
August	29.6°C	16.4°C	111 mm	8.1	13 h 36	64	Good coverage
September	27°C	12.7°C	108 mm	7.5	12 h 23	72	Good coverage
October	21.1°C	5.6°C	87 mm	7.6	11 h 10	62	Good coverage
November	14.8°C	-0.4°C	84 mm	7.5	10 h 07	31	Good coverage
December	8.8°C	-3.2°C	128 mm	9.6	9 h 36	5	Good coverage

Records at BOONEVILLE 12SW, 2002–2021
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	23.3°C12 Jan 2020	-22.8°C7 Jan 2014	58 mm25 Jan 2010	145 mm2006 · driest 45 mm in 2003	19
February	27.8°C21 Feb 2018	-30.6°C21 Feb 2015	84 mm6 Feb 2004	260 mm2019 · driest 33 mm in 2013	20
March	31.1°C22 Mar 2012	-20.0°C6 Mar 2015	101 mm1 Mar 2021	221 mm2021 · driest 27 mm in 2003	20
April	33.3°C7 Apr 2010	-8.3°C9 Apr 2007	57 mm30 Apr 2005	178 mm2015 · driest 30 mm in 2021	20
May	32.8°C28 May 2012	-2.8°C9 May 2020	81 mm4 May 2009	320 mm2009 · driest 39 mm in 2006	19
June	40.6°C30 Jun 2012	3.3°C2 Jun 2003	70 mm21 Jun 2006	201 mm2003 · driest 15 mm in 2012	19
July	40.0°C1 Jul 2012	8.3°C5 Jul 2014	85 mm14 Jul 2015	282 mm2015 · driest 55 mm in 2002	19
August	37.2°C24 Aug 2007	7.8°C15 Aug 2013	93 mm4 Aug 2003	252 mm2014 · driest 19 mm in 2008	19
September	36.1°C14 Sep 2019	0.6°C25 Sep 2012	91 mm18 Sep 2012	227 mm2018 · driest 0 mm in 2019	19
October	35.6°C3 Oct 2019	-5.6°C30 Oct 2008	61 mm24 Oct 2007	158 mm2014 · driest 30 mm in 2008	20
November	29.4°C2 Nov 2016	-12.8°C19 Nov 2014	50 mm4 Nov 2004	158 mm2011 · driest 14 mm in 2009	19
December	24.4°C12 Dec 2007	-16.7°C21 Dec 2004	68 mm6 Dec 2013	198 mm2013 · driest 37 mm in 2006	18

Typical days per month at BOONEVILLE 12SW, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	24	4	4
February	<1	0	23	3	4
March	3	<1	18	4	2
April	11	2	8	4	<1
May	18	6	1	4	0
June	25	11	0	5	0
July	28	16	0	5	0
August	28	15	0	3	0
September	21	9	0	3	0
October	9	2	5	3	0
November	1	0	18	3	<1
December	0	0	22	4	2

How often, not how much — every day in BOONEVILLE 12SW’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%	30%	11%	36%	3.2–9.1°C
February	4%	33%	11%	41%	4.1–12.5°C
March	19%	33%	13%	38%	11.8–17.8°C
April	42%	33%	15%	41%	18.7–23.1°C
May	55%	34%	14%	46%	22.9–27.1°C
June	65%	34%	17%	45%	27.7–29.8°C
July	68%	33%	16%	39%	28.4–31.0°C
August	74%	26%	11%	29%	28.0–30.9°C
September	72%	25%	12%	30%	25.0–29.7°C
October	48%	25%	10%	27%	18.9–23.6°C
November	16%	25%	10%	31%	11.2–17.2°C
December	2%	31%	15%	40%	6.5–11.8°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.

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4282348
NOAA station: USC00150860 · BOONEVILLE 12SW
Station distance: 6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 17 usable years
Daylight: Calculated from latitude 37.31°, 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 BOONEVILLE 12SW is what differs

Annville→McKee→Atkinstown→Blake→Bond→Bradshaw→

Or put two places side by side: Alger vs Annville

Best time to visitAlger.