Portlaoise Weather in September
Portlaoise in September
The short of it: Portlaoise in September averages a high of 17 °C (63 °F) and a low of 9 °C (48 °F), with 90 mm (3.5 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 90 mm · daylight 12 h 35 min
✦✦✦ Fair for a visit · best months: July & August
Thirty years of records give Portlaoise an average September high of 17°, a low of 9° and some 90 mm of rain. Much like August: highs about 17°, nights near 9°. A wool coat will serve you well. Wet spells are common — about 90 mm, the 6th wettest month.
The sun is up for about 12 h 35 min in mid-September, 130 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, Portlaoise runs about middling and wetter than most in September. Athy, 22 km to the ESE, sees much the same highs.
September in Portlaoise, by the numbers
- Warmth rank
- 4th warmest of 12
- Rain rank
- 6th wettest of 12
- Versus August
- 2° colder, 12 mm less rain
- Versus October
- 4° warmer
- Day–night spread
- 8°
- Snow season
- seldom any
- Daylight, mid-month
- 12 h 35 min
- Average wind
- 12 km/h
Neighbouring Towns
September averages · distance by the crow’s flight| Town | Distance | High | Low | Rain |
|---|---|---|---|---|
| AthyLeinster | 22 km ESE | 18° | 10° | 80 mm |
| KildareLeinster | 29 km ENE | 17° | 9° | 81 mm |
| TullamoreLeinster | 29 km NNW | 17° | 9° | 91 mm |
| CarlowLeinster | 33 km SE | 18° | 10° | 81 mm |
| Droichead NuaLeinster | 37 km ENE | 17° | 9° | 79 mm |
| KilkennyLeinster | 42 km S | 18° | 9° | 70 mm |
| NaasLeinster | 47 km ENE | 17° | 9° | 75 mm |
| An Muileann gCearrLeinster | 55 km N | 17° | 9° | 82 mm |