Dundalk in Fall
In fall (September, October and November), Dundalk sees average daytime highs around 13°C and overnight lows near 8°C, with 225 mm of rain over about 38 wet days across the season. It is the 2nd-warmest season and the 2nd-wettest season.
Over the season highs ease from about 17°C in early September to 9°C by late November. The sky is clear or mostly clear about 9% of the time across fall, and the air most often feels dry.
Fall is Dundalk's 2nd-best season to visit on our travel score. For the whole year in context, see Dundalk's year-round climate.
- Avg daytime high
- 13°C
- 2nd-warmest season
- Avg overnight low
- 8°C
- Rainfall
- 225 mm
- 38 wet days
- Avg wind
- 15 km/h
- Travel score
- 3.2
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Dundalk in Fall
Over the season highs ease from about 17°C in early September to 9°C by late November.
A typical fall day in Dundalk reaches about 13°C and drops to 8°C overnight. The warmest of the three months is September, the coolest November.
How fall really feels in Dundalk
Once humidity and wind are folded in, fall brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
fall sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Dundalk weather by month
How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 7° / 3° | 71 | 13.3 | 1.1 | 7.7 | 0.9 |
| Feb | 8° / 3° | 58 | 11.9 | 1 | 9.4 | 1.1 |
| Mar | 9° / 4° | 60 | 12.6 | 0.7 | 11.5 | 1.8 |
| Apr | 12° / 5° | 65 | 12.6 | 0.1 | 13.7 | 2.7 |
| May | 14° / 8° | 69 | 13.8 | 0 | 15.7 | 3.7 |
| Jun | 17° / 10° | 75 | 13 | 0 | 16.8 | 4.7 |
| Jul | 18° / 12° | 76 | 14.5 | 0 | 16.3 | 5.1 |
| Aug | 18° / 12° | 83 | 13.7 | 0 | 14.6 | 5.1 |
| Sep | 16° / 10° | 67 | 12.1 | 0 | 12.5 | 4.5 |
| Oct | 13° / 8° | 78 | 12.4 | 0 | 10.2 | 3.2 |
| Nov | 10° / 5° | 81 | 13.3 | 0.1 | 8.3 | 1.9 |
| Dec | 8° / 3° | 75 | 12.3 | 0.7 | 7.2 | 1.1 |
Cloud cover in Fall
The sky is clear or mostly clear about 9% of the time across fall.
Chance of precipitation in Fall
Dundalk gets around 225 mm of rain over 38 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 15 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 13 h 30 min in early September to 7 h 36 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 1.7 kWh/m².
Is fall a good time to visit Dundalk?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a weaker month for outdoor sightseeing in Dundalk.
What to pack for Dundalk in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Dundalk sees daytime highs around 13°C and nights near 8°C. Pack a warm layer. Worth having: rain gear. About 38 days see rain.
Sea temperature near Dundalk in Fall
The nearest coast averages about 13°C across fall — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 14 km away) is warmest in August at about 15°C and coldest in March near 8°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 9 | 8 | 8 | 9 | 11 | 13 | 15 | 15 | 14 | 13 | 12 | 10 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Bracing | Bracing | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 9 | Bracing |
| Feb | 8 | Bracing |
| Mar | 8 | Bracing |
| Apr | 9 | Bracing |
| May | 11 | Bracing |
| Jun | 13 | Bracing |
| Jul | 15 | Bracing |
| Aug | 15 | Cool |
| Sep | 14 | Bracing |
| Oct | 13 | Bracing |
| Nov | 12 | Bracing |
| Dec | 10 | Bracing |
UV index in Dundalk in Fall
Clear-sky midday UV across fall averages around 2. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Dundalk peaks around August 10 at about 5 (high) — a little sun protection helps at midday. It bottoms out near December 20 at about 0 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 1 | 2 | 3 | 5 | 5 | 5 | 5 | 4 | 2 | 1 | 0 |
| Level | Low | Low | Moderate | Moderate | High | High | High | High | Moderate | Low | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 1 | Low |
| Mar | 2 | Moderate |
| Apr | 3 | Moderate |
| May | 5 | High |
| Jun | 5 | High |
| Jul | 5 | High |
| Aug | 5 | High |
| Sep | 4 | Moderate |
| Oct | 2 | Low |
| Nov | 1 | Low |
| Dec | 0 | Low |
Where is Dundalk?
Dundalk sits at 54.0°N, 6.4°W, 18 m above sea level, in Ireland. The nearest listed city is Newry, 21 km away.
Topography around Dundalk
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Dundalk.
Within 3 km, the terrain around Dundalk has only modest variations in elevation — a maximum elevation change of 58 m around an average of 18 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 582 m; within 80 km, large variations in elevation — a maximum elevation change of 852 m.
The land around Dundalk is covered by grassland (51%) and artificial surfaces (21%) within 3 km, grassland (57%) within 16 km, and grassland (62%) and water (24%) within 80 km.
Ireland travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type G
- 230 V · 50 Hz
- Prices
- ≈ 85% of US
- price level, 2025
- GDP per capita
- $131,592
- 2025
- Happiness
- 6.9 / 10
- World Happiness, 2025
- Safe drinking water
- 96%
- of population, 2024
- Homicide rate
- 0.7
- per 100k, 2023
- Road deaths
- 3.1
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Dundalk (54°, -6.4167°, elevation 18 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.