Temperature
Cool by day, brisk at night.
62°Ftypical September high
Typical range
September climate
September in Waterville
Ireland · Europe
Cool days and some sun.
One of the best months here
Daytime high
62°F
Lows around 55°F
Rain
Frequent rain
Sun
8 h/day
Air feel
Comfortable
When to visit
Month-by-month fit
Best
Precipitation
Rain is frequent. About 15 wet days, fewer than in most months.
50%wet-day frequency
AmountWet-day chance
Sunshine
Cloudier spells limit sunshine.
8.1 hSeptember sunshine
Heat & humidity by month
ComfortableSeptember
Easy airWarm airHumid air
Hourly temperature pattern
In September, afternoons feel about 55° and nights feel near 51°.
Very coldColdCoolNight hours
Clear sky
Mostly cloudy skies this month.
26%September Clear sky
Clear skyCloud
Wind pattern
Breezy conditions are typical in September. More a comfort consideration than a planning concern.
11 mphSeptember Breezy
More detailIncludes daypart comfort
Typical September day
September late afternoons are around 61°F, easing to about 59°F in early evening.
Avg temp Typical range
Morning57°F
Rain29%
Cloud76%
Humid airLow
Sun intensityMinimal
Midday60°F
Rain33%
Cloud78%
Humid airLow
Sun intensityModerate
Late afternoon61°F
Rain31%
Cloud77%
Humid airLow
Sun intensityModerate
Early evening59°F
Rain26%
Cloud73%
Humid airLow
Sun intensityMinimal
Best windowData tableView month-by-month numbers
View month-by-month numbers
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 48 | 41 | 5.6 | 16 | 4.4 | 85 |
| Feb | 50 | 44 | 6.8 | 20 | 5.9 | 83 |
| Mar | 51 | 43 | 5.2 | 17 | 7.8 | 82 |
| Apr | 54 | 46 | 3.1 | 14 | 10.2 | 81 |
| May | 59 | 50 | 3.5 | 14 | 10.9 | 81 |
| Jun | 62 | 53 | 3.4 | 17 | 11.4 | 83 |
| Jul | 64 | 56 | 3.5 | 14 | 10.6 | 85 |
| Aug | 65 | 57 | 4.1 | 18 | 9.8 | 85 |
| Sep | 62 | 55 | 5.8 | 15 | 8.1 | 85 |
| Oct | 58 | 52 | 8.4 | 21 | 6.3 | 85 |
| Nov | 53 | 47 | 7.3 | 21 | 4.9 | 85 |
| Dec | 50 | 44 | 7.2 | 20 | 3.8 | 85 |
Similar climates
Similar
Similar climateAmsterdamNetherlandsSimilar climateLondonUnited KingdomSimilar climateDublinIrelandSimilar climateAberystwythUnited Kingdom
Want a side-by-side climate view? Compare Waterville with Amsterdam.
Climate data notePlanning guidance, not a forecast
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jul 31, 2026
Data & methodology