Navan weather in September 2026

Q: How warm is it in Navan in September?

Daytime temperatures usually reach 17°C in Navan in September, falling to 10°C at night.

Q: How sunny is it in Navan in September?

There are normally 4 hours of bright sunshine each day in Navan in September - that's 33% of daylight hours.

Q: How warm is the sea around Navan in September?

The average sea temperature around Navan in September is 14°C.

Q: Does it rain in Navan in September?

There are usually 15 days with some rain in Navan in September and the average monthly rainfall is 64mm.

Expect daytime maximum temperatures of 63°F in Navan, Ireland in September based on long-term weather averages. There are 4 hours of sunshine per day on average with 17 days with some rainfall and typically 3.2 inches of rainfall in the month.

63
63°F max day temperature
4
4 hours of sunshine per day
17
17 days with some rainfall
48
48°F min night temperature
13
13 hours of daylight per day
0
No heat & humidity
3.2
3.2 inches of monthly rainfall
4
4 (Moderate) UV index

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The September weather guide for Ireland (Navan) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C) | Imperial (°F)

More about Ireland

How warm is it in Navan in September?

Daytime temperatures usually reach 63°F in Navan in September, falling to 50°F at night.

How sunny is it in Navan in September?

There are normally 4 hours of bright sunshine each day in Navan in September - that's 33% of daylight hours.

How warm is the sea around Navan in September?

The average sea temperature around Navan in September is 57°F.

Does it rain in Navan in September?

There are usually 15 days with some rain in Navan in September and the average monthly rainfall is 2.5 inches.

Navan September sunrise & sunset times

Browse the sunrise and sunset times for Navan in September 2026. Select a month to view Navan sunrise and sunset times for the next 12 months.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Date	Sunrise times	Sunset times
Tuesday, 1st September 2026	05:36	19:17
Tuesday, 15th September 2026	06:00	18:43
Wednesday, 30th September 2026	06:27	18:06

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