Best year time to visit Once

General weather information about Once

Average annual temperature is 11.7 °C

Absolute maximum temperature: 31.7 °C

Absolute minimum temperature: -4.4 °C

Number of sunny days: 118 days

Number of rainy days: 246 days

Number of snow days: 1 day

Look at detailed online map of Once

* Weather data for Once Belgium is based on climate observations for 2026 year

Once air temperature forecast for each month

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Absolute maximum temperature (°C)	15.1	13.5	16.4	18.3	23.7	29.6	31.7	27.5	30.0	25.4	15.0	11.6
Average daytime temperature (°C)	6.6	8.1	10.1	12.4	17.9	24.9	22.9	22.0	23.1	16.9	9.5	8.1
Average temperature (°C)	4.7	5.0	6.8	8.3	13.3	19.9	18.8	18.0	18.3	13.5	7.3	6.3
Average night temperature (°C)	2.5	1.9	3.4	4.0	8.1	14.3	14.4	13.9	13.5	10.3	5.1	4.3
Absolute minimum temperature (°C)	-4.0	-4.1	-4.4	-2.7	3.0	9.6	10.5	10.6	8.4	1.9	-2.0	-3.1

Once monthly weather indicators

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daylight maximum duration (h)	9.0	10.0	12.0	14.0	16.0	16.0	16.0	15.0	13.0	11.0	9.0	8.0
Daylight mean duration (h)	8.5	10.0	11.9	13.8	15.5	16.4	16.0	14.5	12.6	10.7	9.0	8.0
Daylight minimum duration (h)	8.0	9.0	10.0	12.0	14.0	16.0	15.0	13.0	11.0	9.0	8.0	7.0
Sunshine mean duration (h)	2.5	4.9	5.5	7.5	10.9	12.8	10.8	9.7	9.2	6.3	3.3	2.4
Precipitation (mm)	97	24	128	87	48	82	136	120	126	115	153	109
Sunny days	8	14	5	8	13	20	5	8	18	12	1	6
Rainy days	22	14	26	22	18	10	26	23	12	19	29	25
Snow days	1	0	0	0	0	0	0	0	0	0	0	0

Once - weather forecast by months

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

Best time to visit Once:

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

May — 10.9(h)
June — 12.8(h)
July — 10.8(h)
August — 9.7(h)
September — 9.2(h)

Months with the longest average daylight duration in Once:

May — 15.5(h)
June — 16.4(h)
July — 16.0(h)

The largest precipitation sum in Once is at

July — 136(mm)

November — 153(mm)

Weather forecast in the closest to Once admin centers