Nan in Spring

In spring (March, April and May), Nan sees average daytime highs around 35°C and overnight lows near 23°C, with 274 mm of rain over about 38 wet days across the season. It is the warmest season of the year and the 3rd-wettest season.

Across spring, daytime highs hold fairly steady around 35°C. The sky is clear or mostly clear about 48% of the time across spring, and the air most often feels oppressive.

Spring is Nan's weakest season of the year to visit on our travel score. For the whole year in context, see Nan's year-round climate.

Avg daytime high: 35°C; warmest season of the year
Avg overnight low: 23°C
Rainfall: 274 mm; 38 wet days
Avg wind: 5 km/h
Travel score: 2.5; weakest season of the year
Months: Mar · Apr · May

← Winter Nan year-round climate Summer →

Spring Summer Fall Winter

Temperature in Nan in Spring

Average highAverage lowShaded bands: 10–90% of days

Across spring, daytime highs hold fairly steady around 35°C.

A typical spring day in Nan reaches about 35°C and drops to 23°C overnight. The warmest of the three months is April, the coolest March.

How spring really feels in Nan

Once humidity and wind are folded in, spring brings about 92 days that feel above 32°C and 0 that feel at or below 0°C.

Days feeling ≥ 32°C

41 feel dangerously hot (≥ 39°C)

Days feeling ≤ 0°C

wind chill below the day's low

The story in spring is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Nan weather by month

How the three spring months (March, April and May) compare with the rest of the year — the season's months are highlighted.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	30° / 16°	15	2	11	6.4
Feb	33° / 17°	8	1.2	11.4	4.7
Mar	35° / 20°	30	4.6	11.9	2.9
Apr	36° / 24°	78	11.6	12.4	2.2
May	34° / 25°	166	21.5	12.9	2.3
Jun	32° / 25°	190	23.4	13.1	2.5
Jul	31° / 25°	273	26.5	13	2.6
Aug	31° / 24°	312	28.1	12.6	2.6
Sep	31° / 24°	221	24.4	12.1	2.8
Oct	31° / 23°	74	13.8	11.6	4.1
Nov	31° / 20°	22	3.5	11.1	5.4
Dec	29° / 17°	14	1.7	10.9	6.6

Cloud cover in Spring

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% of the time across spring.

Chance of precipitation in Spring

Any precipitation

Nan gets around 274 mm of rain over 38 wet days across spring. The line is the day-by-day chance of measurable precipitation.

Humidity in Spring

DryComfortableHumidMuggyOppressiveMiserable

Most of spring feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

Wind in Spring

Winds average 5 km/h across spring.

Sunrise & sunset in Spring

DaylightNight

Daylight runs from about 11 h 36 min in early March to 13 hours by late May. The lit band spans sunrise to sunset each day.

Solar energy in Spring

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day across spring, about 5.9 kWh/m².

Planning a trip in spring

Hazard calendar for Nan

In seasonPeak

In spring, Nan overlaps its monsoon season. The full year is below, with each hazard's peak months called out.

Nan's monsoon runs May–September, when most of the year's rain falls.

Monsoon

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is spring a good time to visit Nan?

Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.

2.5

Sightseeing

4th-best month of the year

5.3

Beach & pool

3rd-best month of the year

spring is a weaker month for outdoor sightseeing in Nan.

What to pack for Nan in Spring

From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In spring, Nan sees daytime highs around 35°C and nights near 23°C. Pack light clothes, rain gear and sun protection. About 38 days see rain.

light clothesrain gearsun protection

UV index in Nan in Spring

LowModerateHighVery highExtreme

Clear-sky midday UV across spring averages around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Nan peaks around August 12 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 7 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	8	9	9	10	11	13	13	13	11	10	8	7
Level	Very high	Very high	Very high	Very high	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high	High

	UV index (midday)	Level
Jan	8	Very high
Feb	9	Very high
Mar	9	Very high
Apr	10	Very high
May	11	Extreme
Jun	13	Extreme
Jul	13	Extreme
Aug	13	Extreme
Sep	11	Extreme
Oct	10	Very high
Nov	8	Very high
Dec	7	High

Air quality in Nan in Spring

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where spring falls, not just the annual average.

Air quality in Nan is worst in March — around 71 µg/m³ PM2.5 (unhealthy), about 4.2× the cleanest month (September, 17 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Nan's WHO annual average of 29.5 µg/m³.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	27	39	71	65	28	17	17	17	17	17	18	21
Level	Moderate	Poor	Unhealthy	Unhealthy	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	27	Moderate
Feb	39	Poor
Mar	71	Unhealthy
Apr	65	Unhealthy
May	28	Moderate
Jun	17	Moderate
Jul	17	Moderate
Aug	17	Moderate
Sep	17	Moderate
Oct	17	Moderate
Nov	18	Moderate
Dec	21	Moderate

Location & terrain

Where is Nan?

Nan sits at 18.8°N, 100.8°E, 205 m above sea level, in Thailand. The nearest listed city is Dok Kham Tai, 93 km away.

Topography around Nan

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Nan.

Within 3 km, the terrain around Nan has only modest variations in elevation — a maximum elevation change of 61 m around an average of 208 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 478 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,915 m.

The land around Nan is covered by trees (39%), artificial surfaces (28%) and cropland (21%) within 3 km, trees (76%) within 16 km, and trees (87%) within 80 km.

3 km

61 m

trees 39%

16 km

478 m

trees 76%

80 km

1,915 m

trees 87%

treesgrasslandcroplandartificial surfacesbare terrainwater

← Winter Nan year-round climate Summer →

Spring weather nearby: Dok Kham Tai 93 km · Phrae 98 km · Phayao 105 km · Den Chai 117 km · Lampang 146 km · Uttaradit 148 km · Chiang Rai 160 km · Ban Houakhoua 166 km

Thailand travel facts

Travel advisory: Level 1; Exercise Normal Precautions
Power plugs: Type A / B / C; 230 V · 50 Hz
Prices: ≈ 31% of US; price level, 2025
GDP per capita: $8,057; 2025
Happiness: 6.3 / 10; World Happiness, 2025
Homicide rate: 4.8; per 100k, 2011
Road deaths: 32.2; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Very low; EF EPI 402
Religion

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Nan (18.7838°, 100.779°, elevation 205 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.