United States · 1991–2020

Best time to visit
Castalia.

May leads for comfortable weather in Castalia: typically 26.4°C by day, 12.1°C at night, with 93 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMay

Typical high26.4°C

Typical low12.1°C

Rain in May93 mm

Comfort

May

May · October · September

74climate match

Beach

June

June · August · July

64climate match

Outdoors

October

October · April · November

75climate match

The weakest month is January, scoring 12 against May’s 74 — days reach only 10.9°C, 13° below the 24°C the score treats as ideal, and nights drop to -2.7°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

1210.9° / -2.7°

Feb

2412.6° / -1.8°

Mar

3817.1° / 1.8°

Apr

6822.5° / 6.6°

May

7426.4° / 12.1°

Jun

5930.4° / 16.8°

Jul

4632.4° / 19.3°

Aug

5131.4° / 18.7°

Sep

7028.1° / 15.2°

Oct

7322.7° / 7.8°

Nov

4417.2° / 1.9°

Dec

2312.7° / -0.9°

Monthly climate evidence for Castalia — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	10.9°C	-2.7°C	88 mm	9	9 h 57	12	Strong coverage
February	12.6°C	-1.8°C	67 mm	7.4	10 h 49	24	Strong coverage
March	17.1°C	1.8°C	105 mm	8.9	11 h 51	38	Strong coverage
April	22.5°C	6.6°C	89 mm	7.8	13 h 03	68	Strong coverage
May	26.4°C	12.1°C	93 mm	7.9	14 h 03	74	Strong coverage
June	30.4°C	16.8°C	116 mm	8.6	14 h 36	59	Strong coverage
July	32.4°C	19.3°C	126 mm	9.1	14 h 23	46	Strong coverage
August	31.4°C	18.7°C	129 mm	8.2	13 h 32	51	Strong coverage
September	28.1°C	15.2°C	125 mm	7.3	12 h 22	70	Strong coverage
October	22.7°C	7.8°C	91 mm	5.6	11 h 12	73	Strong coverage
November	17.2°C	1.9°C	83 mm	6.3	10 h 12	44	Strong coverage
December	12.7°C	-0.9°C	85 mm	7.9	9 h 43	23	Strong coverage

What has changed

Castalia runs +0.6°C
on the 1961–1990 baseline.

Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.

Jan

+1.2

Feb

+1.8

Mar

+0.4

Apr

+0.3

May

+0.2

Jun

+0.4

Jul

+1.0

Aug

-0.3

Sep

+0.2

Oct

+0.4

Nov

-0.2

Dec

+2.1

May daytime highs, 2011–2025. Last recorded: 26.4°C.

Records at LOUISBURG, 1893–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	28.3°C2 Jan 1952	-23.3°C4 Jan 1918	81 mm9 Jan 1895	221 mm1925 · driest 20 mm in 1928	132
February	28.9°C28 Feb 1948	-21.1°C15 Feb 1899	75 mm7 Feb 2020	206 mm1899 · driest 16 mm in 2011	130
March	33.9°C17 Mar 1945	-14.4°C1 Mar 1937	86 mm9 Mar 1998	224 mm2009 · driest 25 mm in 2006	133
April	35.6°C18 Apr 1896	-7.8°C3 Apr 2012	118 mm25 Apr 2017	236 mm2023 · driest 3 mm in 1950	134
May	38.9°C29 May 1941	-2.2°C2 May 1963	102 mm19 May 1983	249 mm1984 · driest 8 mm in 1936	132
June	40.6°C27 Jun 1952	1.7°C8 Jun 2006	125 mm15 Jun 2006	294 mm2006 · driest 8 mm in 2024	132
July	41.7°C27 Jul 1940	5.0°C7 Jul 2006	184 mm24 Jul 2000	408 mm1919 · driest 11 mm in 1953	133
August	41.1°C30 Aug 1932	2.8°C8 Aug 2002	162 mm26 Aug 1999	352 mm1908 · driest 11 mm in 1943	133
September	41.1°C6 Sep 1954	-5.0°C28 Sep 1989	192 mm16 Sep 1999	528 mm1999 · driest 0 mm in 1922	132
October	38.3°C6 Oct 1954	-8.9°C27 Oct 1962	155 mm9 Oct 2016	291 mm1971 · driest 0 mm in 2000	132
November	31.1°C1 Nov 1950	-11.7°C27 Nov 1991	98 mm7 Nov 1963	199 mm1963 · driest 4 mm in 1931	131
December	26.7°C4 Dec 1991	-20.0°C15 Dec 1917	90 mm15 Dec 1956	186 mm1983 · driest 8 mm in 1955	129

Typical days per month at LOUISBURG, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	<1	0	22	3	<1
February	<1	0	20	2	<1
March	4	<1	14	4	<1
April	11	2	3	3	0
May	20	8	<1	3	0
June	27	18	0	4	0
July	30	25	0	4	0
August	29	22	0	4	0
September	24	11	<1	4	0
October	11	2	3	2	0
November	2	0	14	3	<1
December	<1	0	20	3	<1

The best month has moved. On the 1961–1990 numbers the strongest month here was September (scoring 75); on 2011–2025 it is May (79). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in LOUISBURG’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	7%	27%	11%	27%	7.6–14.6°C
February	10%	29%	12%	33%	8.6–15.5°C
March	28%	28%	13%	28%	14.2–19.8°C
April	54%	25%	10%	24%	20.4–24.7°C
May	69%	26%	11%	26%	24.6–28.8°C
June	73%	26%	12%	27%	28.7–32.6°C
July	70%	30%	14%	34%	30.6–33.7°C
August	73%	27%	13%	27%	29.2–33.0°C
September	77%	21%	11%	20%	26.3–30.6°C
October	63%	17%	8%	13%	20.4–24.9°C
November	29%	20%	9%	15%	14.6–19.7°C
December	8%	24%	10%	24%	9.1–15.1°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.

1893Each stripe is one year’s mean temperature against the 115-year average. Warmest: 1933. Coolest: 1988.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4459523
NOAA station: USC00315123 · LOUISBURG
Station distance: 22.3 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 28 usable years
Daylight: Calculated from latitude 36.08°, 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 LOUISBURG is what differs

Louisburg→Franklinton→Bunn→Alert→Barham→Daddysville→

Or put two places side by side: Castalia vs Louisburg

Best time to visitCastalia.

May

June

October

The whole year,without the guesswork.

Castalia runs +0.6°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Castalia.

The whole year,
without the guesswork.

Castalia runs +0.6°C
on the 1961–1990 baseline.

Nearby, measured,
and named.