Cao Bằng in Spring

In spring (March, April and May), Cao Bằng sees average daytime highs around 24°C and overnight lows near 18°C, with 413 mm of rain over about 55 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.

Over the season highs climb from about 19°C in early March to 29°C by late May. The sky is clear or mostly clear about 10% of the time across spring, and the air most often feels muggy.

Spring is Cao Bằng's 3rd-best season to visit on our travel score. For the whole year in context, see Cao Bằng's year-round climate.

Avg daytime high: 24°C; 3rd-warmest season
Avg overnight low: 18°C
Rainfall: 413 mm; 55 wet days
Avg wind: 8 km/h
Travel score: 5.0; 3rd-best season
Months: Mar · Apr · May

← Winter Cao Bằng year-round climate Summer →

Spring Summer Fall Winter

Temperature in Cao Bằng in Spring

Average highAverage lowShaded bands: 10–90% of days

Over the season highs climb from about 19°C in early March to 29°C by late May.

A typical spring day in Cao Bằng reaches about 24°C and drops to 18°C overnight. The warmest of the three months is May, the coolest March.

How spring really feels in Cao Bằng

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

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

spring sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Cao Bằng 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	16° / 10°	67	13.3	10.8	4.3
Feb	18° / 12°	52	11.4	11.2	5.1
Mar	21° / 15°	89	16	11.8	5.3
Apr	25° / 19°	111	17.1	12.5	5.3
May	28° / 21°	214	22.3	13.1	4.3
Jun	29° / 23°	293	25.2	13.4	3.2
Jul	30° / 23°	302	26.4	13.2	3.1
Aug	30° / 23°	268	24.4	12.8	3.4
Sep	29° / 22°	156	16.8	12.1	4.8
Oct	26° / 19°	87	12	11.5	6.3
Nov	22° / 15°	69	9.7	10.9	6.6
Dec	18° / 11°	50	9.4	10.6	5.7

Cloud cover in Spring

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% of the time across spring.

Chance of precipitation in Spring

Any precipitation

Cao Bằng gets around 413 mm of rain over 55 wet days across spring. The line is the day-by-day chance of measurable precipitation.

Humidity in Spring

DryComfortableHumidMuggyOppressiveMiserable

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

Wind in Spring

Winds average 8 km/h across spring.

Sunrise & sunset in Spring

DaylightNight

Daylight runs from about 11 h 30 min in early March to 13 h 18 min 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 3.7 kWh/m².

Planning a trip in spring

Hazard calendar for Cao Bằng

In seasonPeak

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

Cao Bằng'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 Cao Bằng?

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.

5.0

Sightseeing

3rd-best month of the year

4.2

Beach & pool

3rd-best month of the year

spring is a reasonable time to visit Cao Bằng for sightseeing.

What to pack for Cao Bằng in Spring

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

In spring, Cao Bằng sees daytime highs around 24°C and nights near 18°C. Pack light clothes and rain gear. About 55 days see rain.

light clothesrain gear

UV index in Cao Bằng in Spring

LowModerateHighVery highExtreme

Clear-sky midday UV across spring averages around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cao Bằng peaks around June 22 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 6 (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)	6	8	10	7	8	13	12	10	9	7	6	6
Level	High	Very high	Extreme	Very high	Very high	Extreme	Extreme	Extreme	Very high	High	High	High

	UV index (midday)	Level
Jan	6	High
Feb	8	Very high
Mar	10	Extreme
Apr	7	Very high
May	8	Very high
Jun	13	Extreme
Jul	12	Extreme
Aug	10	Extreme
Sep	9	Very high
Oct	7	High
Nov	6	High
Dec	6	High

Air quality in Cao Bằng 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 Cao Bằng is worst in April — around 44 µg/m³ PM2.5 (poor), about 2.2× the cleanest month (July, 20 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	39	41	44	44	30	23	20	21	24	28	33	39
Level	Poor	Poor	Poor	Poor	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Poor

	PM2.5 (µg/m³)	Level
Jan	39	Poor
Feb	41	Poor
Mar	44	Poor
Apr	44	Poor
May	30	Moderate
Jun	23	Moderate
Jul	20	Moderate
Aug	21	Moderate
Sep	24	Moderate
Oct	28	Moderate
Nov	33	Moderate
Dec	39	Poor

Location & terrain

Where is Cao Bằng?

Cao Bằng sits at 22.7°N, 106.3°E, 197 m above sea level, in Vietnam. The nearest listed city is Thị Trấn Nước Hai, 13 km away.

Topography around Cao Bằng

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

Within 3 km, the terrain around Cao Bằng has significant variations in elevation — a maximum elevation change of 396 m around an average of 252 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 818 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,806 m.

The land around Cao Bằng is covered by trees (75%) within 3 km, trees (88%) within 16 km, and trees (88%) within 80 km.

3 km

396 m

trees 75%

16 km

818 m

trees 88%

80 km

1,806 m

trees 88%

treesgrasslandcroplandartificial surfacesbare terrainwater

← Winter Cao Bằng year-round climate Summer →

Spring weather nearby: Thị Trấn Nước Hai 13 km · Thị Trấn Trùng Khánh 33 km · Thị Trấn Thất Khê 51 km · Bắc Kạn 72 km · Lạng Sơn 104 km · Thái Nguyên 126 km · Thị Trấn Na Dương 129 km · Thị Trấn Đại Từ 131 km

Vietnam travel facts

Travel advisory: Level 1; Exercise Normal Precautions
Power plugs: Type A / B / C / F; 220 V · 50 Hz
Prices: ≈ 29% of US; price level, 2025
GDP per capita: $5,066; 2025
Happiness: 6.4 / 10; World Happiness, 2025
Safe drinking water: 59%; of population, 2024
Homicide rate: 1.5; per 100k, 2011
Road deaths: 30.6; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Moderate; EF EPI 500
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 Cao Bằng (22.6657°, 106.2579°, elevation 197 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.