Best year time to visit Illo

General weather information about Illo

Average annual temperature is 6.7 °C

Absolute maximum temperature: 29.8 °C

Absolute minimum temperature: -19.4 °C

Number of sunny days: 123 days

Number of rainy days: 194 days

Number of snow days: 48 days

Look at detailed online map of Illo

* Weather data for Illo Finland is based on climate observations for 2026 year

Illo air temperature forecast for each month

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Absolute maximum temperature (°C)	4.2	6.5	5.0	13.9	22.0	27.8	25.1	29.8	21.7	14.8	8.9	5.3
Average daytime temperature (°C)	1.2	0.7	0.9	8.6	13.1	20.1	20.1	20.2	17.8	7.9	2.5	-1.8
Average temperature (°C)	-0.4	-1.0	-1.4	4.6	9.7	16.5	16.8	17.3	15.3	5.5	0.8	-3.7
Average night temperature (°C)	-2.0	-3.3	-4.2	0.7	5.5	11.5	13.0	14.5	12.2	2.9	-1.1	-5.8
Absolute minimum temperature (°C)	-11.7	-12.7	-13.2	-6.6	-1.6	4.5	10.3	12.5	4.8	-4.0	-10.7	-19.4

Illo monthly weather indicators

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daylight maximum duration (h)	7.0	10.0	13.0	15.0	18.0	18.0	18.0	16.0	14.0	11.0	8.0	6.0
Daylight mean duration (h)	6.8	9.2	11.8	14.6	17.2	18.7	17.9	15.6	12.9	10.1	7.6	6.0
Daylight minimum duration (h)	6.0	7.0	10.0	13.0	15.0	18.0	16.0	14.0	11.0	8.0	6.0	5.0
Sunshine mean duration (h)	1.5	3.2	6.0	11.0	13.7	15.6	13.6	9.5	8.1	4.9	1.4	0.6
Precipitation (mm)	98	52	94	19	30	19	90	146	41	111	81	61
Sunny days	10	13	8	19	22	19	4	3	11	7	5	2
Rainy days	16	10	9	11	9	11	27	28	19	24	18	12
Snow days	5	5	14	0	0	0	0	0	0	0	7	17

Illo - weather forecast by months

Illo weather in january Illo weather in february Illo weather in march Illo weather in april Illo weather in may Illo weather in june Illo weather in july Illo weather in august Illo weather in september Illo weather in october Illo weather in november Illo weather in december

Best time to visit Illo:

The best time to visit Illo during the most sunny months:

April — 11.0(h)
May — 13.7(h)
June — 15.6(h)
July — 13.6(h)
August — 9.5(h)

Months with the longest average daylight duration in Illo:

May — 17.2(h)
June — 18.7(h)
July — 17.9(h)
August — 15.6(h)

The largest precipitation sum in Illo is at

January — 98(mm)

March — 94(mm)

July — 90(mm)

August — 146(mm)

October — 111(mm)

Weather forecast in the closest to Illo admin centers