Phetchabun, Thailand climate

Aw Tropical savanna (dry winter)

Phetchabun has a mildly seasonal tropical climate (Tropical savanna (dry winter), Köppen Aw). The hottest month is April with an average daily high near 37°C, while the coldest is December averaging around 18°C at night. Precipitation totals about 1158 mm a year and is strongly seasonal — September alone averages 227 mm while January barely receives 12 mm.

☀️ All year

Very hot

Daytime highs near 37°C most of the year.

About 250 days a year above 32 °C

🌙 Nights

Stays warm

Even the coolest nights stay near 18°C.

🌧️ Rain

Wet

About 1158 mm of rain a year.

Wettest in September

⛅ Sky & trend

Partly cloudy

A roughly even mix of sun and cloud.

+0.4 °C vs 50 years ago

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Hours of sunshine per day

Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)

Phetchabun climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	32	35	37	37	35	34	33	32	32	33	33	32
Avg temp (°C)	25	27	30	31	30	29	29	28	28	28	27	25
Avg low (°C)	18	19	22	24	25	25	24	24	24	23	21	18
Precipitation (mm)	12	14	56	58	171	139	165	220	227	67	17	13

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	32	35	37	37	35	34
Avg temp (°C)	25	27	30	31	30	29
Avg low (°C)	18	19	22	24	25	25
Precipitation (mm)	12	14	56	58	171	139

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	33	32	32	33	33	32
Avg temp (°C)	29	28	28	28	27	25
Avg low (°C)	24	24	24	23	21	18
Precipitation (mm)	165	220	227	67	17	13

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	2	2	5	8	16	16	18	20	18	10	2	1
Days with high ≥ 32°C (days)	18	22	26	26	25	24	20	18	18	20	18	14

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	2	2	5	8	16	16
Days with high ≥ 32°C (days)	18	22	26	26	25	24

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	18	20	18	10	2	1
Days with high ≥ 32°C (days)	20	18	18	20	18	14

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	32	31	44	59	80	89	91	93	85	61	43	32
Relative humidity (%)	65	57	57	63	76	82	84	86	87	85	79	72
Wind speed (km/h)	5.5	5.5	5.4	4.7	4.6	5.7	6.0	5.7	4.1	4.9	5.8	6.3

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	32	31	44	59	80	89
Relative humidity (%)	65	57	57	63	76	82
Wind speed (km/h)	5.5	5.5	5.4	4.7	4.6	5.7

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	91	93	85	61	43	32
Relative humidity (%)	84	86	87	85	79	72
Wind speed (km/h)	6.0	5.7	4.1	4.9	5.8	6.3

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 26 years of daily observations at Phetchabun, a weather station, about 2 km from the city centre. The underlying daily records come from NOAA's global station network.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →