Thailand · 1991–2020

Best time to visit
Ban I Let.

February leads for comfortable weather in Ban I Let: typically 31.9°C by day, 22.3°C at night, with 82 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortFebruary

Typical high31.9°C

Typical low22.3°C

Rain in February82 mm

Comfort

February

February · January · March

51climate match

Beach

February

February · January · March

76climate match

Outdoors

February

February · January · March

30climate match

The weakest month is May, scoring 10 against February’s 51 — days average 33.6°C, 10° above the 24°C the score treats as ideal, and 229 mm of rain falls.

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

3730.8° / 21.6°

Feb

5131.9° / 22.3°

Mar

2933.3° / 23.4°

Apr

2734.4° / 24.5°

May

1033.6° / 24.8°

Jun

1832.7° / 24.6°

Jul

1832° / 24.2°

Aug

1731.9° / 24.3°

Sep

2031.7° / 24.1°

Oct

1231.2° / 23.7°

Nov

1130.6° / 23°

Dec

2730.2° / 21.7°

Monthly climate evidence for Ban I Let — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 15 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	30.8°C	21.6°C	191 mm	10.2	27.6°C	11 h 35	37	Good coverage
February	31.9°C	22.3°C	82 mm	6.5	28.2°C	11 h 47	51	Good coverage
March	33.3°C	23.4°C	173 mm	9.4	29.1°C	12 h 03	29	Good coverage
April	34.4°C	24.5°C	152 mm	9	30.0°C	12 h 21	27	Good coverage
May	33.6°C	24.8°C	229 mm	17.5	30.2°C	12 h 36	10	Strong coverage
June	32.7°C	24.6°C	194 mm	17.7	29.7°C	12 h 44	18	Good coverage
July	32°C	24.2°C	213 mm	18.9	29.3°C	12 h 40	18	Strong coverage
August	31.9°C	24.3°C	218 mm	19.2	29.0°C	12 h 28	17	Good coverage
September	31.7°C	24.1°C	208 mm	19.2	28.9°C	12 h 10	20	Strong coverage
October	31.2°C	23.7°C	282 mm	18.8	28.9°C	11 h 53	12	Good coverage
November	30.6°C	23°C	328 mm	16.6	28.4°C	11 h 38	11	Strong coverage
December	30.2°C	21.7°C	269 mm	11.4	27.8°C	11 h 31	27	Good coverage

Records at CHUMPHON, 1951–2025
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	34.8°C16 Jan 1998	12.1°C15 Jan 1976	423 mm8 Jan 1975	605 mm2017 · driest 3 mm in 2009	73
February	39.1°C16 Feb 1999	14.4°C5 Feb 2000	138 mm10 Feb 1977	346 mm1977 · driest 0 mm in 2014	72
March	38.0°C19 Mar 1999	16.1°C3 Mar 1955	119 mm22 Mar 1994	425 mm1994 · driest 0 mm in 1992	72
April	38.8°C13 Apr 1998	19.4°C7 Apr 1971	110 mm13 Apr 2013	266 mm2018 · driest 0 mm in 1992	74
May	39.4°C5 May 2024	20.9°C13 May 1963	163 mm1 May 2007	478 mm2022 · driest 54 mm in 2005	75
June	38.7°C1 Jun 1991	20.5°C6 Jun 1990	113 mm4 Jun 2012	364 mm2014 · driest 58 mm in 2002	75
July	35.8°C4 Jul 2023	19.9°C16 Jul 1976	102 mm27 Jul 1990	421 mm1996 · driest 52 mm in 1987	75
August	35.7°C22 Aug 2024	20.8°C14 Aug 1962	252 mm24 Aug 1997	448 mm1997 · driest 62 mm in 2022	75
September	35.6°C8 Sep 2007	21.2°C12 Sep 1961	116 mm27 Sep 1966	371 mm1966 · driest 3 mm in 1999	74
October	35.7°C26 Oct 2024	18.8°C27 Oct 1994	145 mm29 Oct 1971	619 mm2007 · driest 73 mm in 1994	74
November	37.7°C23 Nov 1966	15.6°C30 Nov 1956	264 mm29 Nov 1970	797 mm2024 · driest 25 mm in 1954	74
December	36.5°C4 Dec 1998	12.2°C30 Dec 1975	269 mm5 Dec 2017	604 mm2002 · driest 2 mm in 2004	71

Typical days per month at CHUMPHON, 1991–2020
Month	Days 25°C+	Days 30°C+	Heavy rain (10 mm+)
January	29	22	2
February	27	25	1
March	29	28	3
April	29	28	3
May	29	28	5
June	27	24	5
July	28	23	6
August	28	24	6
September	27	23	6
October	29	23	7
November	28	19	6
December	28	19	4

How often, not how much — every day in CHUMPHON’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	79%	23%	9%	17%	28.9–31.5°C
February	83%	18%	8%	14%	30.5–32.6°C
March	82%	19%	8%	14%	31.5–34.1°C
April	77%	24%	10%	27%	32.9–35.6°C
May	49%	51%	21%	69%	32.2–34.7°C
June	42%	58%	20%	78%	31.3–33.3°C
July	44%	57%	21%	77%	30.7–32.6°C
August	42%	59%	21%	80%	30.5–32.5°C
September	45%	56%	20%	76%	30.7–32.3°C
October	44%	57%	27%	78%	30.1–31.8°C
November	51%	50%	29%	60%	29.0–31.1°C
December	74%	28%	13%	24%	28.5–30.8°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.

1951Each stripe is one year’s mean temperature against the 56-year average. Warmest: 1998. Coolest: 1955.2012

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 1157289
NOAA station: TH000048517 · CHUMPHON
Station distance: 12.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 15 usable years
Daylight: Calculated from latitude 10.38°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 15 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
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 CHUMPHON is what differs

Chumphon→Ban Wang Po→Ban Wang Nam Ka→Ban Ton Makham Yai→Ban Thung Sang→Ban Thung Kha Tok→

Or put two places side by side: Ban I Let vs Chumphon

Best time to visitBan I Let.

February

February

February

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Ban I Let.

The whole year,
without the guesswork.

Nearby, measured,
and named.