How extreme does Merlo's weather get?

The hottest, coldest, wettest and snowiest days Merlo 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 El Palomar station 12 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 Merlo has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day

103°F Feb 13, 2023

The three most extreme on record

1 103°F Feb 13, 2023recent

2 103°F Mar 12, 2023

3 102°F Feb 12, 2023

❄️ Coldest night

19°F Jul 2, 2025

The three most extreme on record

1 19°F Jul 2, 2025recent

2 19°F Jul 5, 2024

3 19°F Jul 9, 2024

🌧️ Most rain in one day

5.12 in Sep 24, 1995

The three most extreme on record

1 5.12 in Sep 24, 1995

2 4.88 in Mar 21, 2024

3 4.37 in Dec 4, 1995

In plain terms

Across the record, Merlo has reached as high as 103°F and as low as 19°F. A single day has delivered over 5 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 — the official 1991–2020 climate normals from the WMO's CLINO 1991–2020 collection, measured at Castelar_inta, about 8 km from the city centre.

How we build these numbers →

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