September
September · August · June
73climate match
United States · 1991–2020
Best time to visit
Sligo.
September leads for comfortable weather in Sligo: typically 23.5°C by day, 10°C at night, with 114 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high23.5°C
Typical low10°C
Rain in September114 mm
July
July · August · June
53climate match
September
September · May · October
68climate match
The weakest month is January, scoring 5 against September’s 73 — days reach only 0.7°C, 23° below the 24°C the score treats as ideal.
Month by month
The whole year,
without the guesswork.
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
Jan
50.7° / -8.9°
Feb
52.5° / -8.6°
Mar
58° / -4.8°
Apr
2815.8° / 0.7°
May
6121.9° / 6.8°
Jun
6625.9° / 11.7°
Jul
6627.9° / 14.2°
Aug
6927.3° / 13.6°
Sep
7323.5° / 10°
Oct
4016.7° / 3.8°
Nov
59.4° / -1.4°
Dec
53.2° / -5.3°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 0.7°C | -8.9°C | 100 mm | 14.5 | 9 h 31 | 5 | Strong coverage |
| February | 2.5°C | -8.6°C | 77 mm | 11.6 | 10 h 34 | 5 | Strong coverage |
| March | 8°C | -4.8°C | 93 mm | 11.5 | 11 h 48 | 5 | Strong coverage |
| April | 15.8°C | 0.7°C | 109 mm | 13 | 13 h 15 | 28 | Strong coverage |
| May | 21.9°C | 6.8°C | 103 mm | 11.5 | 14 h 27 | 61 | Strong coverage |
| June | 25.9°C | 11.7°C | 134 mm | 11.9 | 15 h 07 | 66 | Strong coverage |
| July | 27.9°C | 14.2°C | 132 mm | 10.1 | 14 h 51 | 66 | Strong coverage |
| August | 27.3°C | 13.6°C | 113 mm | 10 | 13 h 49 | 69 | Strong coverage |
| September | 23.5°C | 10°C | 114 mm | 9.4 | 12 h 25 | 73 | Strong coverage |
| October | 16.7°C | 3.8°C | 95 mm | 11.2 | 11 h 02 | 40 | Strong coverage |
| November | 9.4°C | -1.4°C | 102 mm | 11.6 | 9 h 49 | 5 | Strong coverage |
| December | 3.2°C | -5.3°C | 94 mm | 13.1 | 9 h 14 | 5 | Strong coverage |
What has changed
Sligo runs +0.1°C
on the 1961–1990 baseline.
Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.
Jan
-0.1
Feb
+0.9
Mar
+0.2
Apr
0.0
May
-0.2
Jun
-0.5
Jul
+0.2
Aug
-0.4
Sep
+0.3
Oct
+0.1
Nov
0.0
Dec
+1.2
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 22.2°C25 Jan 1950 | -31.7°C31 Jan 1948 | 71 mm7 Jan 1999 | 226 mm1999 · driest 13 mm in 2025 | 79 |
| February | 22.8°C21 Feb 2018 | -32.2°C2 Feb 1961 | 47 mm18 Feb 2022 | 175 mm1956 · driest 8 mm in 1969 | 82 |
| March | 28.9°C15 Mar 1990 | -26.7°C2 Mar 2015 | 72 mm1 Mar 2012 | 176 mm2012 · driest 12 mm in 2019 | 82 |
| April | 33.3°C18 Apr 1976 | -15.0°C1 Apr 1964 | 81 mm12 Apr 2024 | 221 mm2024 · driest 5 mm in 2023 | 80 |
| May | 36.1°C15 May 1991 | -8.3°C4 May 1971 | 77 mm31 May 1953 | 234 mm1953 · driest 29 mm in 2023 | 79 |
| June | 38.3°C21 Jun 1991 | -3.9°C14 Jun 1978 | 79 mm23 Jun 1975 | 329 mm1972 · driest 11 mm in 2024 | 84 |
| July | 38.3°C20 Jul 1991 | 2.2°C21 Jul 1966 | 126 mm19 Jul 1996 | 317 mm1992 · driest 19 mm in 2025 | 83 |
| August | 40.0°C29 Aug 1991 | -0.6°C28 Aug 1982 | 67 mm15 Aug 1973 | 226 mm1994 · driest 18 mm in 2025 | 83 |
| September | 36.1°C5 Sep 1954 | -3.9°C27 Sep 1957 | 104 mm22 Sep 1992 | 241 mm1996 · driest 24 mm in 1948 | 82 |
| October | 30.6°C6 Oct 1946 | -11.7°C29 Oct 1965 | 121 mm16 Oct 1954 | 263 mm1954 · driest 0 mm in 2000 | 83 |
| November | 26.7°C1 Nov 1950 | -18.3°C30 Nov 1958 | 67 mm1 Nov 1994 | 305 mm1985 · driest 15 mm in 1962 | 82 |
| December | 21.1°C3 Dec 1982 | -30.6°C28 Dec 1950 | 74 mm1 Dec 2010 | 159 mm1990 · driest 16 mm in 2021 | 82 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 26 | 3 | 7 |
| February | 0 | 0 | 24 | 2 | 5 |
| March | <1 | 0 | 24 | 3 | 3 |
| April | 3 | <1 | 14 | 3 | <1 |
| May | 9 | 2 | 3 | 3 | 0 |
| June | 17 | 5 | 0 | 4 | 0 |
| July | 23 | 8 | 0 | 4 | 0 |
| August | 22 | 6 | 0 | 3 | 0 |
| September | 11 | 3 | <1 | 3 | 0 |
| October | 2 | <1 | 7 | 3 | 0 |
| November | <1 | 0 | 18 | 3 | 1 |
| December | 0 | 0 | 25 | 3 | 4 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 41% | 9% | 55% | -2.5–4.6°C |
| February | <1% | 38% | 8% | 52% | -0.9–6.4°C |
| March | 6% | 37% | 10% | 52% | 4.3–12.4°C |
| April | 22% | 40% | 12% | 52% | 13.1–18.9°C |
| May | 46% | 38% | 13% | 50% | 19.3–24.6°C |
| June | 61% | 36% | 14% | 45% | 24.1–28.1°C |
| July | 68% | 32% | 13% | 38% | 26.0–30.1°C |
| August | 69% | 30% | 12% | 34% | 25.3–29.1°C |
| September | 58% | 29% | 11% | 33% | 21.5–25.5°C |
| October | 28% | 32% | 9% | 39% | 14.9–19.5°C |
| November | 3% | 37% | 10% | 52% | 6.6–12.6°C |
| December | <1% | 40% | 9% | 56% | -0.1–6.3°C |
A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.
The evidence behind this page
Nearby, measured,
and named.
- Place identity
- GeoNames 5212521
- NOAA station
- USC00361485 · CLARION 3 SW
- Station distance
- 10.3 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 27 usable years
- Daylight
- Calculated from latitude 41.11°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.