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Weather extremes

How extreme does Sơn La's weather get?

The hottest, coldest, wettest and snowiest days Sơn La has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.

Based on 28 years of daily weather observations (1997–present), from the Son La station 2 km away. Updated through August 2025 — an all-time extreme only changes when a more extreme day actually occurs, so some dates are old. That is normal, not stale data.

The four kinds of extreme

The hottest, coldest, wettest and snowiest single days Sơn La has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
104°F Jul 18, 2014

That is about 18°F hotter than a normal July afternoon in Sơn La (typical high near 86°F).

The three most extreme on record

1 104°F Jul 18, 2014
2 104°F Oct 5, 1999
3 104°F Oct 14, 1999
❄️ Coldest night
33°F Dec 27, 1999

About 20°F colder than a normal December night in Sơn La (typical low near 53°F).

The three most extreme on record

1 33°F Dec 27, 1999
2 33°F Feb 9, 2016
3 33°F Dec 26, 1999
🌧️ Most rain in one day
8.66 in Jun 25, 2015

More rain in a single day than Sơn La usually gets in the whole month of June (typical June total about 6.8 in).

The three most extreme on record

1 8.66 in Jun 25, 2015
2 6.84 in Jul 24, 2024
3 5.91 in May 24, 2016

How hot and cold it gets, month by month

The shaded band is the normal range of daily temperatures for each month. The dots show the most extreme it has ever been — so you can see how far beyond a normal day the records really sit.

10°30°50°70°90°110°130° all-time high 104°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Sơn La's record heat sits well above even a hot day for the season — July's 104°F is about 18°F beyond a normal hot afternoon. Its record cold is just as far below a normal winter night — the dots mark how rare each extreme really is.

In plain terms

In a normal year, Sơn La's warmest days reach the high 80s°F and its coldest nights drop to the low 50s°F. But across the record it has gone as high as 104°F and as low as 33°F. A single day has delivered over 9 inches of rain. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.
Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 24 years of daily observations at Son LA, a weather station, about 2 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →