Tallaght weather in January

In January, Tallaght sees average daytime highs of 7°C and overnight lows near 3°C, with 69 mm of precipitation across 13.2 wet days and about 7.8 hours of daylight. It is the 12th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 7°C through the month. The sky is clear or mostly clear about 12% of the time in January, and the air most often feels dry.

Daylight stretches from about 7 h 24 min at the start of January to 8 h 30 min by month's end. Set against the rest of the year, January is Tallaght's 5th-clearest and 1st-windiest month. For the whole year in context, see Tallaght's year-round climate.

Daytime high
12th warmest
Overnight low
2nd coldest
Precipitation
69 mm
13.2 wet days
Daylight
7 h 48 min
8:41 AM – 4:29 PM
Cloud cover
74%
5th clearest
Wind
19 km/h
1st windiest
Solar energy
0.73 kWh/m²
Travel score
1.0
out of 10

Tallaght is county town of South Dublin, Ireland.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 7°C through the month.

A typical January day in Tallaght reaches about 7°C in the afternoon and slips back to 3°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 4°C and 11°C. Set against its neighbours, January runs on par with December and on par with February.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
173
273
373
473
573
673
773
873
973
1073
1173
1283
1383
1483
1573
1673
1773
1873
1973
2073
2173
2273
2373
2473
2573
2673
2773
2873
2973
3073
3173

How January really feels in Tallaght

Once humidity and wind are folded in, January averages 0 days that feel above 32°C and 31 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
31
wind chill below the day's low

The story in January is cold — wind chill drags the overnight "feels like" below the raw low.

Tallaght weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 6913.20.97.81.0
Feb / 5711.81.29.41.1
Mar / 5912.21.111.51.7
Apr11° / 6613.80.113.72.4
May14° / 6613.6015.63.5
Jun16° / 10°7313.2016.64.5
Jul18° / 12°7614.8016.24.9
Aug18° / 12°7813.7014.65.1
Sep16° / 10°7012.3012.44.5
Oct13° / 7812.4010.33.2
Nov10° / 8513.20.38.41.9
Dec / 7612.90.87.41.2

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 16% of January, with mostly cloudy or overcast conditions the remaining 73%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12971
22971
33070
43070
53169
63070
73070
83070
93070
103070
113070
122971
132971
142971
152872
162872
172773
182773
192674
202575
212575
222575
232575
242575
252575
262575
272476
282476
292476
302476
312476

Chance of precipitation in January

Any precipitationSnow

Tallaght gets around 69 mm of rain and snow over 13.2 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 42% and peaks near 45% on the wettest days, and about 1 day brings snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1445
2445
3455
4455
5455
6455
7455
8454
9444
10444
11444
12444
13434
14433
15433
16423
17423
18423
19412
20412
21412
22412
23412
24402
25402
26402
27402
28402
29402
30403
31403

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in January

Winds average 19 km/h in January, the windiest month of the year.

Across January, daily wind ranges from about 19 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
119light breeze
219light breeze
319light breeze
419light breeze
519light breeze
619light breeze
720light breeze
820light breeze
920light breeze
1020light breeze
1119light breeze
1219light breeze
1319light breeze
1419light breeze
1519light breeze
1619light breeze
1719light breeze
1819light breeze
1919light breeze
2019light breeze
2119light breeze
2219light breeze
2319light breeze
2419light breeze
2519light breeze
2619light breeze
2719light breeze
2819light breeze
2919light breeze
3019light breeze
3119light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 7 h 24 min at the start of January to 8 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over January. Sunrise moves from 8:48 AM to 8:23 AM, and sunset from 4:09 PM to 4:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
17.48:484:09
27.48:484:10
37.48:484:11
47.48:484:12
57.48:474:13
67.58:474:15
77.58:474:16
87.58:464:17
97.58:464:18
107.68:454:20
117.68:454:21
127.68:444:23
137.78:434:24
147.78:434:26
157.88:424:27
167.88:414:29
177.88:404:30
187.98:394:32
197.98:384:34
208.08:374:35
218.08:364:37
228.18:354:39
238.18:344:40
248.28:324:42
258.28:314:44
268.38:304:46
278.38:294:47
288.48:274:49
298.48:264:51
308.58:244:53
318.58:234:55

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 0.73 kWh/m².

For context, solar energy here swings from a low near 0.56 kWh/m² to a high of 5.27 kWh/m² in June across the year — January's 0.73 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
10.6Dim
20.6Dim
30.6Dim
40.6Dim
50.6Dim
60.6Dim
70.6Dim
80.6Dim
90.7Dim
100.7Dim
110.7Dim
120.7Dim
130.7Dim
140.7Dim
150.7Dim
160.7Dim
170.7Dim
180.8Dim
190.8Dim
200.8Dim
210.8Dim
220.8Dim
230.8Dim
240.8Dim
250.9Dim
260.9Dim
270.9Dim
280.9Dim
291.0Dim
301.0Dim
311.0Dim
Planning a trip in January

Is January a good time to visit Tallaght?

Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

1.0
Sightseeing
12th-best month of the year
0.0
Beach & pool
7th-best month of the year

January is a weaker month for outdoor sightseeing in Tallaght.

What to pack for Tallaght in January

From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In January, Tallaght sees daytime highs around 7°C and nights near 3°C. Pack a warm layer. Worth having: a heavy coat and rain gear. About 13 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Tallaght in January

The nearest coast averages about 9°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 19 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.

10°15°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan9Bracing
Feb8Bracing
Mar8Bracing
Apr9Bracing
May11Bracing
Jun13Bracing
Jul15Bracing
Aug15Cool
Sep15Bracing
Oct13Bracing
Nov12Bracing
Dec11Bracing

UV index in Tallaght in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 1. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Tallaght peaks around August 13 at about 6 (high) — a little sun protection helps at midday. It bottoms out near January 1 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowAug 13UV 6Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar3Moderate
Apr4Moderate
May5High
Jun6High
Jul5High
Aug6High
Sep4Moderate
Oct2Low
Nov1Low
Dec1Low
Location & terrain

Where is Tallaght?

Tallaght sits at 53.3°N, 6.4°W, 103 m above sea level, in Ireland. The nearest listed city is South Dublin, 2.0 km away.

Topography around Tallaght

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Tallaght.

Within 3 km, the terrain around Tallaght has significant variations in elevation — a maximum elevation change of 289 m around an average of 107 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 754 m; within 80 km, large variations in elevation — a maximum elevation change of 946 m.

The land around Tallaght is covered by artificial surfaces (43%) and grassland (37%) within 3 km, grassland (47%), trees (21%) and artificial surfaces (21%) within 16 km, and grassland (54%) and water (24%) within 80 km.

3 km
289 m
16 km
754 m
80 km
946 m
treesgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: South Dublin 2.0 km · Templeogue 4.0 km · Rathfarnham 6.0 km · Lucan 9.0 km · Dublin 10 km · Sandyford 10 km · Blanchardstown 11 km · Leixlip 12 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
Roman Catholic 69%none 15%Protestant 4%Orthodox 2%

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 Tallaght (53.2859°, -6.3734°, elevation 103 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).