Nong Khai climate — normals and trends

Q: What is the climate of Nong Khai?

Nong Khai has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 26.0 °C and it receives 1,935 mm of precipitation per year.

Q: What is the hottest day ever recorded in Nong Khai?

The hottest day measured in Nong Khai between 1940 and 2025 was 6 May 2023, reaching 42.5 °C.

Q: What is the coldest day in Nong Khai?

The coldest day measured in Nong Khai between 1940 and 2025 was 12 January 1955, at 3.8 °C.

Q: Does it snow in Nong Khai?

Almost never: Nong Khai sees virtually no snow, with about 0 frost days per year.

Q: Has the climate of Nong Khai warmed?

Yes: Nong Khai warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in Nong Khai?

The wettest day measured in Nong Khai between 1940 and 2025 was 5 May 1964, with 177 mm of rain in 24 hours.

Q: What was the windiest day in Nong Khai?

The windiest day measured in Nong Khai between 1940 and 2025 was 13 March 2009, with winds reaching 32.9 km/h.

Q: What is the warmest month in Nong Khai?

The warmest month in Nong Khai is April (28.7 °C on average); the coldest is January (21.8 °C).

Q: How much does it rain in Nong Khai?

Nong Khai receives on average 1,935 mm of precipitation per year, spread over about 170 rainy days.

Q: Is it sunny in Nong Khai?

Nong Khai gets on average 9.4 hours of sunshine per day, roughly 3,431 hours per year over 1940-2025.

Nong Khai (Thailand) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 26.0 °C and it receives 1,935 mm of precipitation per year.

These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.

The warmest month is April (28.7 °C on average) and the coldest is January (21.8 °C). Rainfall peaks in August.

Nong Khai averages 0 frost days, 243 hot days (≥ 30 °C) and 170 rainy days per year.

Nong Khai has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.

The hottest day of the period reached 42.5 °C (on 6 May 2023) and the coldest 3.8 °C (on 12 January 1955).

Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.

Climate normals · ERA5

Nong KhaiNong Khai

coords: 17.88°, 102.74°
period: 1940–2025 · 86 yrs

AwTropical savannaWarmest monthAprilColdest monthJanuaryWettest monthAugustDriest monthDecember

Mean daily temperature

26.0°C

Average daily high

31.1°C

Average daily low

22.0°C

Annual rainfall

1,935mm

Sunshine / day

9.4h

Mean relative humidity

76%

Average peak wind

10.0km/h

Seasonal range

6.9°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

243 d/yr

Rainy days (≥ 1 mm)

170 d/yr

Annual snowfall

0.0 cm

Average feels-like high

35.6 °C

Average feels-like low

25.4 °C

Average peak gust

26.5 km/h

Tropical nights (≥ 20 °C)

269 d/yr

Solar radiation

17.8 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+1.9 °C

since 1940

+0.2 °C per decade · r² = 0.70 · p = < 0.001

19402025

Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).

A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.

Records for the period

Hottest day

42.5 °C

6 May 2023

Coldest day

3.8 °C

12 January 1955

Wettest day

177 mm

5 May 1964

Windiest day

32.9 km/h

13 March 2009

Strongest gust

64.8 km/h

22 October 1952

Hottest feels-like

48.3 °C

7 May 2023

Coldest feels-like

0.8 °C

12 January 1955

Sunniest day

12.7 h

6 July 2024

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days
2025	39.0 °C25 April 2025	9.7 °C14 January 2025	26.6 °C	1,673 mm	268
2024	42.5 °C30 April 2024	13.6 °C21 December 2024	27.7 °C	1,677 mm	309
2023	42.5 °C6 May 2023	11.0 °C31 January 2023	27.6 °C	1,851 mm	296
2022	38.4 °C28 April 2022	12.1 °C20 December 2022	26.9 °C	1,864 mm	291
2021	38.7 °C2 June 2021	9.9 °C3 January 2021	27.0 °C	1,614 mm	284
2020	41.1 °C6 May 2020	13.7 °C21 December 2020	27.3 °C	1,613 mm	300
2019	40.9 °C20 April 2019	8.8 °C8 December 2019	27.7 °C	1,367 mm	323
2018	39.1 °C13 April 2018	12.9 °C6 February 2018	26.9 °C	1,872 mm	293
2017	39.9 °C3 May 2017	8.7 °C21 December 2017	26.9 °C	2,185 mm	280
2016	41.5 °C12 April 2016	9.6 °C8 February 2016	27.1 °C	1,767 mm	294
2015	41.1 °C20 April 2015	10.2 °C14 January 2015	27.3 °C	1,496 mm	295
2014	39.5 °C31 March 2014	7.7 °C24 January 2014	26.7 °C	1,785 mm	272
2013	41.0 °C5 April 2013	10.5 °C20 December 2013	26.6 °C	1,860 mm	268
2012	38.4 °C19 April 2012	14.1 °C10 January 2012	27.1 °C	1,742 mm	301
2011	38.2 °C17 April 2011	10.9 °C26 December 2011	25.8 °C	2,115 mm	243
2010	40.0 °C14 April 2010	13.4 °C27 December 2010	27.0 °C	2,038 mm	275
2009	39.4 °C24 April 2009	8.7 °C12 January 2009	26.6 °C	1,645 mm	271
2008	36.2 °C11 April 2008	10.6 °C3 January 2008	25.8 °C	2,097 mm	236
2007	40.3 °C2 April 2007	10.0 °C30 January 2007	26.7 °C	1,795 mm	277
2006	39.1 °C6 April 2006	10.6 °C21 December 2006	26.8 °C	1,731 mm	291
2005	40.2 °C12 April 2005	10.7 °C2 January 2005	26.8 °C	2,089 mm	269
2004	38.7 °C31 March 2004	11.9 °C25 January 2004	26.1 °C	1,734 mm	254
2003	41.2 °C7 May 2003	10.6 °C21 December 2003	26.6 °C	1,624 mm	271
2002	39.8 °C22 April 2002	12.9 °C6 January 2002	26.6 °C	2,192 mm	268
2001	40.0 °C21 April 2001	11.6 °C25 December 2001	26.4 °C	2,156 mm	258
2000	38.5 °C3 April 2000	10.2 °C2 February 2000	26.0 °C	2,173 mm	248
1999	38.0 °C18 March 1999	5.6 °C24 December 1999	26.0 °C	1,986 mm	235
1998	40.2 °C13 April 1998	12.7 °C12 December 1998	27.2 °C	1,623 mm	300
1997	38.0 °C5 May 1997	12.8 °C11 January 1997	26.2 °C	1,993 mm	242
1996	38.2 °C20 March 1996	8.6 °C2 January 1996	25.6 °C	2,024 mm	215
1995	38.8 °C23 April 1995	10.2 °C30 December 1995	26.2 °C	2,250 mm	243
1994	38.1 °C4 May 1994	13.6 °C24 January 1994	26.0 °C	2,347 mm	223
1993	38.1 °C27 March 1993	8.7 °C31 January 1993	26.0 °C	1,628 mm	261
1992	39.9 °C21 April 1992	10.7 °C15 January 1992	25.8 °C	1,844 mm	228
1991	39.1 °C17 April 1991	12.1 °C29 December 1991	26.4 °C	1,669 mm	246
1990	40.7 °C23 April 1990	12.4 °C3 December 1990	26.2 °C	2,059 mm	250
1989	40.0 °C22 April 1989	11.5 °C3 December 1989	25.9 °C	2,007 mm	241
1988	39.6 °C22 April 1988	11.9 °C13 December 1988	26.2 °C	1,944 mm	232
1987	38.1 °C25 March 1987	9.2 °C8 December 1987	26.3 °C	1,801 mm	254
1986	38.9 °C17 March 1986	9.5 °C7 January 1986	25.9 °C	2,139 mm	237
1985	40.0 °C10 April 1985	9.9 °C24 December 1985	25.9 °C	1,797 mm	237
1984	39.4 °C4 April 1984	10.4 °C10 January 1984	25.8 °C	2,060 mm	218
1983	40.8 °C14 April 1983	8.1 °C24 January 1983	25.9 °C	2,031 mm	237
1982	37.2 °C15 March 1982	8.6 °C20 December 1982	25.8 °C	2,082 mm	226
1981	37.8 °C6 April 1981	10.3 °C15 January 1981	25.8 °C	2,224 mm	224
1980	39.7 °C23 April 1980	12.4 °C8 January 1980	26.4 °C	2,268 mm	272
1979	38.5 °C7 April 1979	12.8 °C28 December 1979	26.1 °C	1,956 mm	258
1978	37.6 °C7 March 1978	11.7 °C15 December 1978	25.8 °C	2,713 mm	237
1977	38.0 °C17 April 1977	12.5 °C23 February 1977	25.7 °C	1,864 mm	234
1976	38.8 °C17 April 1976	7.5 °C1 January 1976	25.3 °C	2,113 mm	227
1975	40.8 °C28 April 1975	6.1 °C31 December 1975	25.7 °C	2,813 mm	231
1974	37.4 °C6 April 1974	5.0 °C2 January 1974	25.5 °C	2,088 mm	213
1973	41.0 °C7 April 1973	7.3 °C27 December 1973	26.2 °C	2,187 mm	252
1972	38.2 °C21 April 1972	10.2 °C16 January 1972	25.9 °C	2,156 mm	247
1971	38.3 °C31 March 1971	8.9 °C5 January 1971	25.3 °C	1,860 mm	209
1970	38.7 °C12 March 1970	13.1 °C20 January 1970	26.1 °C	1,923 mm	232
1969	39.6 °C5 May 1969	11.0 °C5 December 1969	26.1 °C	1,786 mm	244
1968	38.3 °C28 March 1968	11.4 °C6 January 1968	25.9 °C	1,880 mm	253
1967	38.8 °C31 March 1967	6.7 °C18 January 1967	25.5 °C	1,500 mm	205
1966	37.2 °C12 May 1966	11.8 °C1 January 1966	26.0 °C	1,865 mm	224
1965	37.9 °C3 April 1965	10.2 °C19 January 1965	25.7 °C	2,251 mm	237
1964	36.6 °C7 April 1964	9.9 °C21 December 1964	25.3 °C	2,321 mm	206
1963	38.1 °C21 April 1963	6.5 °C16 January 1963	25.1 °C	2,133 mm	198
1962	38.6 °C2 April 1962	8.8 °C28 January 1962	25.2 °C	2,031 mm	216
1961	37.6 °C25 March 1961	5.8 °C19 January 1961	25.6 °C	2,303 mm	228
1960	40.7 °C2 May 1960	9.5 °C3 January 1960	25.9 °C	1,978 mm	237
1959	37.5 °C12 April 1959	10.7 °C14 January 1959	25.8 °C	2,185 mm	240
1958	41.5 °C24 April 1958	11.1 °C14 February 1958	25.7 °C	1,879 mm	220
1957	40.1 °C23 April 1957	12.6 °C13 February 1957	25.9 °C	2,064 mm	243
1956	38.5 °C24 March 1956	9.6 °C11 January 1956	25.3 °C	2,051 mm	228
1955	41.2 °C18 April 1955	3.8 °C12 January 1955	25.3 °C	1,850 mm	238
1954	39.2 °C18 April 1954	8.3 °C18 December 1954	25.7 °C	1,326 mm	251
1953	36.1 °C15 April 1953	11.0 °C12 December 1953	25.2 °C	2,223 mm	208
1952	37.6 °C12 April 1952	9.1 °C11 December 1952	25.4 °C	2,483 mm	215
1951	39.2 °C10 April 1951	12.3 °C1 January 1951	25.4 °C	1,946 mm	223
1950	40.6 °C24 April 1950	11.8 °C6 February 1950	25.5 °C	1,720 mm	201
1949	37.3 °C15 June 1949	8.2 °C17 January 1949	25.8 °C	1,661 mm	229
1948	39.1 °C13 March 1948	7.1 °C3 January 1948	25.2 °C	1,876 mm	198
1947	38.7 °C7 May 1947	9.7 °C30 December 1947	25.8 °C	1,543 mm	232
1946	38.7 °C28 March 1946	9.0 °C11 January 1946	25.9 °C	957 mm	257
1945	37.3 °C19 April 1945	8.9 °C18 January 1945	25.1 °C	1,995 mm	206
1944	39.3 °C8 April 1944	8.5 °C21 December 1944	25.8 °C	1,530 mm	229
1943	37.8 °C25 March 1943	9.7 °C13 January 1943	24.9 °C	1,825 mm	181
1942	37.9 °C20 April 1942	11.3 °C15 December 1942	25.1 °C	1,957 mm	159
1941	39.1 °C23 March 1941	14.2 °C2 February 1941	25.5 °C	1,929 mm	160
1940	38.5 °C10 March 1940	10.4 °C2 January 1940	24.8 °C	2,138 mm	153

Normals computed over complete calendar years 1940–2025.

A specific year

Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?

Year

Across the whole year

Average daily high

31.8 °C

+0.7 °C

Hot days (≥ 30 °C)

268 d/yr

+25

Frost days (< 0 °C)

0 d/yr

Annual rainfall

1673 mm

-262 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	28.3 °C	-0.2 °C	0 mm	-11 mm
Feb	31.3 °C	+0.5 °C	36 mm	+21 mm
Mar	33.3 °C	-0.1 °C	6 mm	-30 mm
Apr	35.3 °C	+0.9 °C	47 mm	-33 mm
May	33.8 °C	+1.1 °C	173 mm	-77 mm
Jun	32.7 °C	+0.9 °C	288 mm	-47 mm
Jul	31.0 °C	-0.3 °C	412 mm	+67 mm
Aug	32.2 °C	+1.3 °C	316 mm	-81 mm
Sep	31.6 °C	+0.7 °C	286 mm	-44 mm
Oct	32.4 °C	+1.7 °C	58 mm	-52 mm
Nov	29.6 °C	-0.2 °C	43 mm	+22 mm
Dec	30.0 °C	+1.9 °C	9 mm	+4 mm

The year's extremes

Hottest day

39.0 °C

25 Apr 2025

Coldest day

9.7 °C

14 Jan 2025

Wettest day

80.4 mm

26 Aug 2025

Windiest day

27.2 km/h

26 Jan 2025

Strongest gust

55.8 km/h

26 Jan 2025

Hottest feels-like

45.2 °C

25 Apr 2025

Coldest feels-like

8.6 °C

13 Jan 2025

Sunniest day

12.6 h

25 Jun 2025

What was the weather like that day?

Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.

Date

Frequently asked questions

What is the climate of Nong Khai?

Nong Khai has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 26.0 °C and it receives 1,935 mm of precipitation per year.

What is the hottest day ever recorded in Nong Khai?

The hottest day measured in Nong Khai between 1940 and 2025 was 6 May 2023, reaching 42.5 °C.

What is the coldest day in Nong Khai?

The coldest day measured in Nong Khai between 1940 and 2025 was 12 January 1955, at 3.8 °C.

Does it snow in Nong Khai?

Almost never: Nong Khai sees virtually no snow, with about 0 frost days per year.

Has the climate of Nong Khai warmed?

Yes: Nong Khai warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in Nong Khai?

The wettest day measured in Nong Khai between 1940 and 2025 was 5 May 1964, with 177 mm of rain in 24 hours.

What was the windiest day in Nong Khai?

The windiest day measured in Nong Khai between 1940 and 2025 was 13 March 2009, with winds reaching 32.9 km/h.

What is the warmest month in Nong Khai?

The warmest month in Nong Khai is April (28.7 °C on average); the coldest is January (21.8 °C).

How much does it rain in Nong Khai?

Nong Khai receives on average 1,935 mm of precipitation per year, spread over about 170 rainy days.

Is it sunny in Nong Khai?

Nong Khai gets on average 9.4 hours of sunshine per day, roughly 3,431 hours per year over 1940-2025.

Are there tropical nights in Nong Khai?

Yes: Nong Khai has on average 269 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in Nong Khai?

In Nong Khai, between 1940 and 2025, the highest apparent temperature reached 48.3 °C on 7 May 2023, and the lowest was 0.8 °C on 12 January 1955.

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