Patan climate — normals and trends
Patan (Nepal) has a subtropical highland, dry winter climate (Cwb) under the Köppen-Geiger classification. Its mean annual temperature is 16.8 °C and it receives 2,853 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 June (21.5 °C on average) and the coldest is January (9.2 °C). Rainfall peaks in July.
Patan averages 0 frost days, 2 hot days (≥ 30 °C) and 205 rainy days per year.
Patan has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.
The hottest day of the period reached 34.2 °C (on 26 May 1957) and the coldest -4.8 °C (on 7 January 1945).
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
PatanBagmati Province
- coords
- 27.68°, 85.31°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.8°C
Average daily high
21.3°C
Average daily low
12.8°C
Annual rainfall
2,853mm
Sunshine / day
9.4h
Mean relative humidity
77%
Average peak wind
6.6km/h
Seasonal range
12.3°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
205 d/yr
Annual snowfall
0.2 cm
Average feels-like high
22.6 °C
Average feels-like low
12.9 °C
Average peak gust
27.6 km/h
Tropical nights (≥ 20 °C)
16 d/yr
Solar radiation
16.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.67 · p = < 0.001
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
34.2 °C
26 May 1957
Coldest day
-4.8 °C
7 January 1945
Wettest day
317 mm
5 August 1957
Windiest day
15.9 km/h
8 April 1975
Strongest gust
74.5 km/h
12 October 1973
Hottest feels-like
36.0 °C
24 July 2025
Coldest feels-like
-8.6 °C
7 January 1945
Snowiest day
11.2 cm
6 January 1945
Sunniest day
13.1 h
6 June 1981
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?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 16.6 °C | +2.1 °C | 10 mm | -40 mm |
| Feb | 18.6 °C | +1.9 °C | 17 mm | -32 mm |
| Mar | 22.6 °C | +2.0 °C | 38 mm | -23 mm |
| Apr | 25.0 °C | +0.8 °C | 115 mm | +35 mm |
| May | 24.6 °C | -0.4 °C | 248 mm | +69 mm |
| Jun | 25.8 °C | +0.8 °C | 623 mm | +133 mm |
| Jul | 26.4 °C | +2.0 °C | 438 mm | -339 mm |
| Aug | 25.7 °C | +1.2 °C | 585 mm | -46 mm |
| Sep | 25.8 °C | +1.7 °C | 437 mm | +77 mm |
| Oct | 23.4 °C | +1.3 °C | 308 mm | +187 mm |
| Nov | 20.8 °C | +2.1 °C | 34 mm | +2 mm |
| Dec | 17.0 °C | +1.2 °C | 0 mm | -23 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Patan?
Patan has a subtropical highland, dry winter climate (Köppen Cwb). Over 1940-2025, the average annual temperature is 16.8 °C and it receives 2,853 mm of precipitation per year.
What is the hottest day ever recorded in Patan?
The hottest day measured in Patan between 1940 and 2025 was 26 May 1957, reaching 34.2 °C.
What is the coldest day in Patan?
The coldest day measured in Patan between 1940 and 2025 was 7 January 1945, at -4.8 °C.
Does it snow in Patan?
Almost never: Patan sees virtually no snow, with about 0 frost days per year.
Has the climate of Patan warmed?
Yes: Patan warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Patan?
The wettest day measured in Patan between 1940 and 2025 was 5 August 1957, with 317 mm of rain in 24 hours.
What was the windiest day in Patan?
The windiest day measured in Patan between 1940 and 2025 was 8 April 1975, with winds reaching 15.9 km/h.
What is the warmest month in Patan?
The warmest month in Patan is June (21.5 °C on average); the coldest is January (9.2 °C).
How much does it rain in Patan?
Patan receives on average 2,853 mm of precipitation per year, spread over about 205 rainy days.
Is it sunny in Patan?
Patan gets on average 9.4 hours of sunshine per day, roughly 3,431 hours per year over 1940-2025.
What is the biggest single-day snowfall in Patan?
The heaviest 24-hour snowfall measured in Patan between 1940 and 2025 was 6 January 1945, with 11.2 cm.
Are there tropical nights in Patan?
Yes: Patan has on average 16 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Patan?
In Patan, between 1940 and 2025, the highest apparent temperature reached 36.0 °C on 24 July 2025, and the lowest was -8.6 °C on 7 January 1945.
Compare Patan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Patan