Weather in Letterkenny

14-day forecast · updated today, Wednesday, October 28, at 9:57 pm (GMT)

Now · overcast 52 °F

Feels like: 50 °F
Low / high: 49 / 56 °F
Rain: 100% · 0.12 in
Wind: 6 mph S

↗ 30.15 inHg · rising

Today in Letterkenny: light rain, 49 °F to 56 °F, with a 100% chance of rain (0.12 in) and a light breeze from the south (6 mph). Tomorrow, overcast, 50 °F to 55 °F and a 0% chance of rain. The warmest day of the week is Friday 30, at 56 °F. Next likely rain: Friday 30 (29%).

Temperatures for the next 14 days

56° 49°
Today
55° 50°
Thu 29
56° 51°
Fri 30
56° 49°
Sat 31
52° 44°
Sun 1
51° 39°
Mon 2
46° 35°
Tue 3
48° 42°
Wed 4
51° 42°
Thu 5
51° 40°
Fri 6
47° 39°
Sat 7
44° 33°
Sun 8
52° 44°
Mon 9
53° 50°
Tue 10

Day by day

Day	Sky	Low / high	Rain	Max wind	Model
Today · 28	Light rain	49 / 56 °F	100% · 0.12 in	16 mph SW	ICON-EU
Thu 29	Overcast	50 / 55 °F	0%	15 mph SSE	ICON-EU
Fri 30	Light showers	51 / 56 °F	29% · 0.15 in	17 mph SSE	ICON-EU
Sat 31	Light showers	49 / 56 °F	36% · 0.09 in	8 mph S	ICON-EU
Sun 1	Overcast	44 / 52 °F	0%	7 mph NNW	ICON-EU
Mon 2	Partly cloudy	39 / 51 °F	0%	4 mph SSE	ICON-EU + ECMWF
Tue 3	Overcast	35 / 46 °F	0%	4 mph S	ECMWF
Wed 4	Overcast	42 / 48 °F	2%	5 mph SSE	ECMWF
Thu 5	Overcast	42 / 51 °F	2%	11 mph SE	ECMWF
Fri 6	Partly cloudy	40 / 51 °F	6%	13 mph SE	ECMWF
Sat 7	Overcast	39 / 47 °F	10%	4 mph SE	ECMWF
Sun 8	Overcast	33 / 44 °F	27%	4 mph ESE	ECMWF
Mon 9	Overcast	44 / 52 °F	27%	4 mph E	ECMWF
Tue 10	Light drizzle	50 / 53 °F	27% · 0.11 in	6 mph E	ECMWF

Each hour comes from the best model for this spot: ICON-EU until Monday 2 7:00 pm; then ECMWF until Thursday 12 3:00 pm; then GFS.

Each day comes from the best model covering this spot: regional ones first (HRRR and NBM in the U.S., AROME, ICON-EU), then ECMWF; day 16, NOAA GFS. Waves: Météo-France up to day 10, then ECMWF WAM, coarser and further offshore.

Today, every 3 hours

Time	12:00 am	3:00 am	6:00 am	9:00 am	12:00 pm	3:00 pm	6:00 pm	9:00 pm
Sky	Light rain	Light rain	Light rain	Partly cloudy	Overcast	Overcast	Overcast	Overcast
Temperature	49°	53°	52°	53°	55°	55°	54°	53°
Chance of rain	98%	100%	39%	22%	31%	0%	0%	0%
Rain	0.03 in	0.00 in	0.01 in	0.00 in	0.00 in	0.00 in	0.00 in	0.00 in
Wind (mph)	15 SSW	16 WSW	9 SW	11 SW	13 WSW	9 SW	6 S	6 S
Humidity	91%	86%	90%	89%	83%	81%	89%	91%
UV	0	0	0	0	1	0	0	0
Model	ICON-EU	ICON-EU	ICON-EU	ICON-EU	ICON-EU	ICON-EU	ICON-EU	ICON-EU

Do the models agree?

Low confidence

They don't agree on rain on Saturday 31: it may change, so check again closer to the day.

What 6 forecast models say for the next few days. The closer they are, the more reliable the forecast.

HighRainWind

Do the models agree? · High
High (°F)	Today	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF	57°	57°	60°	57°	53°	51°	46°
AIFS	56°	57°	59°	55°	53°	50°	49°
GFS	56°	56°	58°	54°	53°	55°	52°
ICON	56°	56°	57°	55°	52°	55°	50°
ARPEGE	57°	57°	58°	55°	—	—	—
ICON-EU	56°	55°	56°	56°	52°	—	—
Confidence	high	high	high	high	high	high	medium

Do the models agree? · Rain
Rain	Today	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF	0.12 in	0	0.03 in	0.02 in	0	0	0
AIFS	0.15 in	0	0.04 in	0.17 in	0	0	0
GFS	0.16 in	0	0	0.02 in	0	0	0
ICON	0.08 in	0	0.06 in	0.02 in	0	0	0
ARPEGE	0.05 in	0	0.02 in	0.30 in	—	—	—
ICON-EU	0.12 in	0	0.15 in	0.09 in	0	—	—
Confidence	high	high	medium	low	high	high	high

Do the models agree? · Wind
Wind (mph)	Today	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF	1835	1732	1832	1219	919	724	411
AIFS	18	15	15	8	6	6	7
GFS	1739	1534	1535	811	79	37	49
ICON	1630	1528	1835	615	815	49	611
ARPEGE	1834	1730	2136	712	—	—	—
ICON-EU	1632	1529	1732	814	713	—	—
Confidence	high	high	high	high	high	high	high

Chance of rain from the ensemble models

Model	Today	Thu 29	Fri 30	Sat 31	Sun 1	Mon 2	Tue 3
ECMWF (51 scenarios)	100%	0%	29%	36%	0%	0%	0%
GFS (GEFS, 31 scenarios)	100%	0%	40%	55%	3%	0%	0%

Each model's day runs midnight to midnight local time; models that reach fewer days are left blank. Rain: daily total. Wind: the day's highest average wind and, in small type, the strongest gust. Highlighted: values that stand out from the rest. The chance of rain comes from many runs of the same model with slightly different starting data.

Outlook

How the coming weeks and months compare with what is normal for the time of year. It is a trend, not a day-by-day forecast.

The next few weeks look normal for the time of year.

Next 6 weeks

When	TemperatureTemp.	Rain	Typical high / low
Nov 2 – Nov 8Nov 2–Nov 8	Normal −0.2 °F	Below −84%	—
Nov 9 – Nov 15Nov 9–Nov 15	Normal +0.7 °F	Normal	48° / 43°
Nov 16 – Nov 22Nov 16–Nov 22	Normal +0.7 °F	Normal	47° / 43°
Nov 23 – Nov 29Nov 23–Nov 29	Normal +0.4 °F	Normal	46° / 42°
Nov 30 – Dec 6Nov 30–Dec 6	Normal −0.2 °F	Normal	46° / 42°

Coming months

When	TemperatureTemp.	Rain
November	Normal +0.2 °F	Normal
December	A bit above +1.1 °F	Normal
January	A bit above +1.1 °F	Normal
February	A bit above +0.9 °F	Normal
March	A bit above +0.9 °F	Normal

Weeks: ECMWF 46-day (average of its scenarios), against the normal of the last 20 years for those dates. Months: ECMWF SEAS5. Rain: total against normal. The further ahead, the closer it gets to normal and the less detail it can give.

Letterkenny climate by monthClimate by month

Normal weather for each month (1991–2020 averages)

The best time to visit Letterkenny is from June to August: highs of 61 °F to 64 °F, about 15 rainy days a month and 5 hours of sunshine a day.

46° 37°

JanJ
46° 37°

FebF
49° 39°

MarM
53° 42°

AprA
57° 45°

MayM
61° 50°

JunJ
64° 53°

JulJ
63° 53°

AugA
61° 50°

SepS
55° 46°

OctO
50° 42°

NovN
46° 38°

DecD

Highs and lows
Monthly rainfall
Best time

Month	High	Low	Rain	Rainy daysDays	Sun (h/day)	Water	Waves
JanuaryJan	46°	37°	7.77 in	18	0.8	48°	12 ft
FebruaryFeb	46°	37°	6.22 in	15	2.2	47°	12 ft
MarchMar	49°	39°	5.07 in	14	3.3	47°	10.0 ft
AprilApr	53°	42°	4.08 in	13	5.2	49°	7.5 ft
MayMay	57°	45°	3.87 in	12	6.3	52°	6.4 ft
JuneJun	61°	50°	4.54 in	14	5.6	55°	5.1 ft
JulyJul	64°	53°	5.75 in	16	4.8	58°	5.0 ft
AugustAug	63°	53°	5.72 in	16	4.0	59°	5.6 ft
SeptemberSep	61°	50°	5.64 in	14	3.7	58°	7.7 ft
OctoberOct	55°	46°	7.43 in	16	2.3	56°	8.4 ft
NovemberNov	50°	42°	7.50 in	17	1.3	53°	9.9 ft
DecemberDec	46°	38°	7.83 in	17	0.8	50°	12 ft

Month	Water	Waves
Jan	48°	12 ft
Feb	47°	12 ft
Mar	47°	10.0 ft
Apr	49°	7.5 ft
May	52°	6.4 ft
Jun	55°	5.1 ft
Jul	58°	5.0 ft
Aug	59°	5.6 ft
Sep	58°	7.7 ft
Oct	56°	8.4 ft
Nov	53°	9.9 ft
Dec	50°	12 ft

Days: rainy days in the month. Sun: hours a day.

A normal year brings 71.42 in of rain on about 182 days and about 1,250 hours of sunshine.

1991–2020 averages. Highs, lows and rainfall: TerraClimate; rainy days (0.04 in or more): NASA POWER (MERRA-2); sunshine hours: estimated from solar radiation; water: NOAA OISST; waves (average height): ERA5, 2011–2020. Normals are not a forecast: any given year can turn out very different. Sources and licenses

Temperature

Now52 °Ffeels like 50 °F

Tomorrow50 / 55 °F

It's 52 °F now (feels like 50 °F). Today, 49 °F to 56 °F; tomorrow, 50 °F to 55 °F.

Chance of rain

Today 100% 0.12 in
Thu 29 0%
Fri 30 29% 0.15 in
Sat 31 36% 0.09 in
Sun 1 0%
Mon 2 0%
Tue 3 0%

Today the chance of rain reaches 100%, with 0.12 in in total. The next day with likely rain is Friday 30: 29% and 0.15 in.

Recent rain: last 24 hours, 0.14 in; last 3 days, 0.69 in; last 7 days, 2.08 in.

Humidity and dew point

Humidity93%

Dew point50 °F

Humidity is 93% now and the dew point is 50 °F. The temperature is very close to the dew point: fog may form.

The dew point is the temperature at which the air becomes saturated: the higher it is, the heavier the air feels.

Visibility and fog

Now9.8 migood

Clouds99%

Visibility is good now (9.8 mi). No fog expected today.

UV index

Now0

Today's peak1low

Thu 29: 1 · Fri 30: 1 · Sat 31: 0

Index	Level	What to do
0–2	low	No special protection needed.
3–5	moderate	Hat, sunglasses and sunscreen around midday.
6–7	high	Sunscreen, hat and shade between 12 and 4 pm.
8–10	very high	Avoid the midday sun; reflection off the water adds to it.
11+	extreme	Avoid the sun between 11 am and 5 pm; protect yourself even if it is cloudy.

Reflection off water and sand adds radiation: protect yourself more on a boat or at the beach.

Barometric pressure

↗ Rising · now Anglers say fish bite less for a while
→ Steady Anglers expect normal activity
↘ Falling Anglers say fish feed more before the change

29.8030.0030.20 30.31

Rising now (+0.04 inHg in 3 hours). Over the next 48 hours: +0.17 inHg. Rising pressure: anglers say fish bite less for a while. Fast changes, either way, tend to affect fishing.

Air and pollen

Air qualityFair · 21

PollenNoneToday, at most none.

Pollen: Copernicus CAMS model (a rough guide, not a pollen trap). Levels use each type's usual thresholds.

Previous days

The weather over the last 30 days, as the models analyzed it. Tap a day to see it hour by hour.

Day	Sky	Low / high	Rain	Max wind
Tue 27	Light rain	47 / 52 °F	0.46 in	24 mph SW
Mon 26	Light rain	45 / 61 °F	0.44 in	21 mph S
Sun 25	Drizzle	46 / 49 °F	0.26 in	31 mph W
Sat 24	Rain	43 / 53 °F	0.88 in	32 mph SW
Fri 23	Drizzle	42 / 49 °F	0.23 in	16 mph WNW
Thu 22	Light drizzle	38 / 53 °F	0.02 in	7 mph SW
Wed 21	Rain	38 / 49 °F	1.04 in	23 mph WNW

Show all 30 days

Day	Sky	Low / high	Rain	Max wind
Tue 20	Drizzle	43 / 56 °F	0.03 in	15 mph SSE
Mon 19	Overcast	32 / 54 °F	0	11 mph SSE
Sun 18	Mainly clear	35 / 54 °F	0	7 mph S
Sat 17	Overcast	40 / 55 °F	0	6 mph W
Fri 16	Light drizzle	44 / 54 °F	0.11 in	13 mph WNW
Thu 15	Light rain	46 / 56 °F	0.29 in	15 mph WSW
Wed 14	Light rain	49 / 60 °F	0.39 in	23 mph S
Tue 13	Light rain	49 / 63 °F	0.31 in	21 mph WSW
Mon 12	Light rain	56 / 62 °F	0.10 in	18 mph S
Sun 11	Light drizzle	44 / 55 °F	0.00 in	15 mph SE
Sat 10	Light drizzle	48 / 54 °F	0.10 in	20 mph WNW
Fri 9	Light rain	50 / 59 °F	0.44 in	19 mph W
Thu 8	Light rain	45 / 58 °F	0.69 in	15 mph SW
Wed 7	Light drizzle	45 / 53 °F	0.06 in	17 mph WNW
Tue 6	Light drizzle	46 / 57 °F	0.01 in	8 mph WNW
Mon 5	Light drizzle	52 / 61 °F	0.06 in	17 mph WSW
Sun 4	Light drizzle	51 / 63 °F	0.04 in	16 mph SW
Sat 3	Overcast	48 / 59 °F	0	11 mph SW
Fri 2	Heavy drizzle	49 / 57 °F	0.32 in	17 mph SSW
Thu 1	Light drizzle	49 / 59 °F	0.04 in	15 mph S
Wed 30	Heavy drizzle	53 / 63 °F	0.22 in	22 mph S
Tue 29	Drizzle	51 / 63 °F	0.19 in	24 mph SE
Mon 28	Overcast	46 / 61 °F	0	13 mph S

These are the models at the start of each day (ECMWF and GFS; waves from Météo-France), not readings from a weather station: there can be differences at specific spots.

Questions about the weather in LetterkennyQuestions

What's the weather like today in Letterkenny?

Light rain, from 49 °F to 56 °F, with a light breeze from the south (6 mph) and a 100% chance of rain.

Will it rain tomorrow in Letterkenny?

On Thursday 29 the chance of rain is 0% (0.00 in): overcast.

How warm will it be this week?

Between a low of 35 °F and a high of 56 °F; the warmest day, Friday 30.

What's the UV index today?

It reaches 1 (low). No special protection needed.

Is the pressure rising or falling?

It's 30.15 inHg and rising: +0.38 inHg over the last 24 hours.

When is the best time to visit Letterkenny?

The best time to visit Letterkenny is from June to August: highs of 61 °F to 64 °F, about 15 rainy days a month and 5 hours of sunshine a day.

What is the weather like in Letterkenny in October?

In October, Letterkenny normally sees highs of 55 °F and lows of 46 °F, with about 16 rainy days (7.43 in for the month) and 2 hours of sunshine a day. The sea is around 56 °F. These are 1991–2020 averages.

What are the warmest and wettest months in Letterkenny?

The warmest is July, with average highs of 64 °F, and the coldest February, with lows of 37 °F. The wettest is December (7.83 in) and the driest, May.

More about Letterkenny today

Weather near Letterkenny

Only places with a different forecast: spots a few miles apart share the same model cell and wouldn't add anything.

Learn more

Weather: Open-Meteo, CC BY 4.0, with the best model for each spot and lead time (NOAA HRRR and NBM in the U.S., Météo-France AROME, DWD ICON-EU, ECMWF IFS and NOAA GFS); ECMWF grid point 3.5 mi away. The comparison also uses ICON (DWD), AIFS (ECMWF) and ARPEGE (Météo-France). Outlook: ECMWF 46-day and SEAS5. Chance of rain from ensemble models (ECMWF, GEFS and NBM). UV, air quality and pollen: CAMS (Copernicus).

Forecast from Open-Meteo (CC BY 4.0) with models from ECMWF, NOAA, Météo-France, DWD, Copernicus Marine and CAMS. Updated at 9:57 pm (local time).

Spotted a mistake? Tell us · Where the weather and sea data come from