United States · 1991–2020

Best time to visit
Allisona.

May leads for comfortable weather in Allisona: typically 25.2°C by day, 12.2°C at night, with 109 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMay

Typical high25.2°C

Typical low12.2°C

Rain in May109 mm

Comfort

May

May · September · October

75climate match

Beach

June

June · August · July

68climate match

Outdoors

October

October · April · May

76climate match

The weakest month is January, scoring 5 against May’s 75 — days reach only 8.3°C, 16° below the 24°C the score treats as ideal, and nights drop to -3°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

58.3° / -3°

Feb

610.4° / -1.6°

Mar

3115.8° / 2.6°

Apr

5521° / 6.8°

May

7525.2° / 12.2°

Jun

6229.4° / 17.1°

Jul

5130.6° / 19.1°

Aug

5630.6° / 18.3°

Sep

7328.1° / 14.8°

Oct

7022.1° / 8°

Nov

3415.4° / 1.6°

Dec

510.4° / -1°

Monthly climate evidence for Allisona — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	8.3°C	-3°C	134 mm	9.5	9 h 59	5	Good coverage
February	10.4°C	-1.6°C	129 mm	10.1	10 h 50	6	Good coverage
March	15.8°C	2.6°C	127 mm	10.6	11 h 51	31	Good coverage
April	21°C	6.8°C	137 mm	9.2	13 h 03	55	Good coverage
May	25.2°C	12.2°C	109 mm	9.7	14 h 02	75	Good coverage
June	29.4°C	17.1°C	113 mm	8.8	14 h 34	62	Good coverage
July	30.6°C	19.1°C	135 mm	9.7	14 h 21	51	Good coverage
August	30.6°C	18.3°C	113 mm	8.6	13 h 30	56	Good coverage
September	28.1°C	14.8°C	103 mm	6.6	12 h 22	73	Good coverage
October	22.1°C	8°C	90 mm	7	11 h 13	70	Good coverage
November	15.4°C	1.6°C	99 mm	7.7	10 h 14	34	Good coverage
December	10.4°C	-1°C	163 mm	10.2	9 h 45	5	Good coverage

Records at CHRISTIANA 5W, 2004–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	24.4°C2 Jan 2022	-23.9°C17 Jan 2024	117 mm23 Jan 2006	255 mm2006 · driest 66 mm in 2014	22
February	27.2°C24 Feb 2023	-17.8°C19 Feb 2015	102 mm18 Feb 2021	293 mm2018 · driest 48 mm in 2026	22
March	29.4°C23 Mar 2026	-12.2°C6 Mar 2015	175 mm28 Mar 2021	344 mm2021 · driest 23 mm in 2026	22
April	31.7°C10 Apr 2011	-7.8°C8 Apr 2007	94 mm22 Apr 2017	287 mm2011 · driest 36 mm in 2012	22
May	32.8°C28 May 2012	0.0°C4 May 2005	134 mm9 May 2024	282 mm2024 · driest 22 mm in 2005	23
June	41.1°C30 Jun 2012	6.1°C1 Jun 2021	70 mm27 Jun 2015	195 mm2025 · driest 34 mm in 2020	23
July	40.0°C1 Jul 2012	11.1°C31 Jul 2014	93 mm31 Jul 2024	224 mm2013 · driest 40 mm in 2008	23
August	40.6°C17 Aug 2007	8.3°C13 Aug 2004	85 mm4 Aug 2011	166 mm2021 · driest 7 mm in 2024	22
September	36.7°C4 Sep 2011	3.3°C24 Sep 2012	113 mm17 Sep 2004	246 mm2009 · driest 4 mm in 2019	22
October	36.1°C4 Oct 2019	-3.9°C19 Oct 2022	81 mm14 Oct 2014	226 mm2014 · driest 0 mm in 2024	22
November	30.0°C2 Nov 2016	-11.1°C28 Nov 2013	58 mm30 Nov 2015	174 mm2011 · driest 36 mm in 2009	22
December	23.3°C28 Dec 2015	-19.4°C23 Dec 2022	70 mm10 Dec 2008	229 mm2018 · driest 54 mm in 2006	22

Typical days per month at CHRISTIANA 5W, 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	18	4	1
March	2	0	12	5	<1
April	9	<1	3	4	0
May	18	4	<1	3	0
June	27	14	0	4	0
July	28	19	0	4	0
August	29	19	0	4	0
September	24	11	0	3	0
October	10	2	2	3	0
November	1	<1	13	3	0
December	0	0	18	5	<1

How often, not how much — every day in CHRISTIANA 5W’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%	31%	15%	39%	5.6–11.2°C
February	5%	35%	16%	43%	6.2–14.9°C
March	23%	33%	15%	40%	13.5–20.3°C
April	43%	30%	15%	39%	19.2–23.5°C
May	58%	33%	13%	44%	23.5–27.1°C
June	70%	29%	14%	31%	28.1–30.7°C
July	68%	31%	14%	36%	28.6–31.9°C
August	72%	28%	12%	32%	29.0–31.9°C
September	76%	22%	10%	19%	26.3–29.7°C
October	55%	21%	8%	25%	20.0–24.3°C
November	19%	25%	11%	24%	13.1–18.1°C
December	4%	32%	16%	40%	7.9–12.8°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.

2005Each stripe is one year’s mean temperature against the 20-year average. Warmest: 2016. Coolest: 2014.2024

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4602428
NOAA station: USC00401720 · CHRISTIANA 5W
Station distance: 19.3 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 16 usable years
Daylight: Calculated from latitude 35.75°, 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 CHRISTIANA 5W is what differs

Christiana→Chapel Hill→Unionville→Eagleville→Barfield Meadows→Barfield→

Or put two places side by side: Allisona vs Christiana

Best time to visitAllisona.

May

June

October

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Allisona.

The whole year,
without the guesswork.

Nearby, measured,
and named.