Climate-Zone.com

HomeCitiesCosta RicaAlajuelaTools › Weather extremes

Weather extremes

How extreme does Alajuela's weather get?

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

Based on 34 years of daily weather observations (1991–present), from the Juan Santamaria Intl station 3 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 Alajuela has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
103°F Apr 21, 2018

That is about 16°F hotter than a normal April afternoon in Alajuela (typical high near 87°F).

The three most extreme on record

1 103°F Apr 21, 2018
2 102°F Jan 20, 1998
3 98°F Apr 3, 2001
❄️ Coldest night
41°F Aug 25, 1992

About 24°F colder than a normal August night in Alajuela (typical low near 65°F).

The three most extreme on record

1 41°F Aug 25, 1992
2 51°F Dec 11, 2005
3 53°F Jan 14, 2012
🌧️ Most rain in one day
19.02 in Oct 13, 1994

More rain in a single day than Alajuela usually gets in the whole month of October (typical October total about 11.3 in).

The three most extreme on record

1 19.02 in Oct 13, 1994
2 11.08 in Jun 4, 2013
3 8.50 in Nov 21, 2023

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.

30°50°70°90°110°130° all-time high 103°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Alajuela's record heat sits well above even a hot day for the season — April's 103°F is about 16°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, Alajuela's warmest days reach the high 80s°F and its coldest nights drop to the mid-60s°F. But across the record it has gone as high as 103°F and as low as 41°F. A single day has delivered over 19 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 28 years of daily observations at Juan Santamaria Intl, a weather station, about 3 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →