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Weather extremes

How extreme does Monaghan's weather get?

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

Based on 50+ years of daily weather observations (1971–present), from the Armagh station 24 km away. Updated through March 2026 — 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 Monaghan has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
88°F Jul 21, 2021

That is about 21°F hotter than a normal July afternoon in Monaghan (typical high near 67°F).

The three most extreme on record

1 88°F Jul 21, 2021recent
2 88°F Jul 17, 2022
3 87°F Jun 26, 2018
❄️ Coldest night
11°F Dec 21, 2010

About 25°F colder than a normal December night in Monaghan (typical low near 36°F).

The three most extreme on record

1 11°F Dec 21, 2010
2 11°F Dec 25, 2010
3 12°F Dec 26, 2010
🌧️ Most rain in one day
3.27 in Feb 10, 2009

More rain in a single day than Monaghan usually gets in the whole month of February (typical February total about 2.4 in).

The three most extreme on record

1 3.27 in Feb 10, 2009
2 3.15 in Mar 9, 2009
3 2.76 in Feb 5, 2009

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°10°30°50°70°90°110° all-time high 88°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Monaghan's record heat sits well above even a hot day for the season — July's 88°F is about 21°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, Monaghan's warmest days reach the high 60s°F and its coldest nights drop to the mid-30s°F. But across the record it has gone as high as 88°F and as low as 11°F. A single day has delivered over 3 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 30 years of daily observations at Armagh, a weather station, about 24 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →