Roscommon Weather in September
Roscommon in September
The short of it: Roscommon in September averages a high of 17 °C (63 °F) and a low of 9 °C (48 °F), with 95 mm (3.7 in) of rain and about 12 h 35 min of daylight. Rated 3 of 5 for a visit; the best months are July and August. Source: TerraClimate climate normals, 1991–2020.
Average high 17° · low 9° · rain 95 mm · daylight 12 h 35 min
✦✦✦ Fair for a visit · best months: July & August
September in Roscommon brings afternoons near 17° and nights around 9°, with about 95 mm of rain over the month. Much like August: highs about 17°, nights near 9°. A wool coat will serve you well. Wet spells are common — about 95 mm, the 7th wettest month.
The sun is up for about 12 h 35 min in mid-September, 133 minutes less than a month before.
For the traveller: pack layers, a wool coat and stout boots, and an oilskin besides. The Almanac rates September 3 of 5 for a visit; the finest months here are July and August.
Against its neighbours, Roscommon runs cooler than most and wetter than most in September. Lanesborough, 14 km to the ENE, sees much the same highs.
September in Roscommon, by the numbers
- Warmth rank
- 4th warmest of 12
- Rain rank
- 7th wettest of 12
- Versus August
- 2° colder, 10 mm less rain
- Versus October
- 4° warmer
- Day–night spread
- 8°
- Snow season
- seldom any
- Daylight, mid-month
- 12 h 35 min
- Average wind
- 11 km/h
Neighbouring Towns
September averages · distance by the crow’s flight| Town | Distance | High | Low | Rain |
|---|---|---|---|---|
| LanesboroughLeinster | 14 km ENE | 17° | 9° | 84 mm |
| BallygarConnacht | 16 km SW | 17° | 9° | 92 mm |
| CastlereaConnacht | 26 km NW | 17° | 9° | 117 mm |
| LongfordLeinster | 27 km ENE | 17° | 9° | 84 mm |
| BallymahonLeinster | 28 km ESE | 17° | 9° | 87 mm |
| AthloneLeinster | 29 km SE | 17° | 10° | 80 mm |
| MoateLeinster | 32 km ESE | 17° | 9° | 88 mm |
| BallinasloeConnacht | 34 km S | 17° | 9° | 85 mm |