Temperature & Precipitation
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Temperature (°C)	12	11	10	10	10	10	9	9	9	9	9	10	12	13	13	12	10	9	9	7	7	8	8	7
Precipitation (mm/hr)	0.67	0.97	2.41	0.91	1.61	1.38	1.28	0.31	0.05	0.04	0	0	0	0	0.01	0.57	1.45	0.18	0.35	0.23	0.28	0.41	0.4	0.54

Cloud cover and precipitation probability

Cloud cover & Rain chance
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Cloud cover (%)	100	100	100	100	100	100	100	100	100	100	99	96	100	42	100	100	100	100	96	64	100	93	67	65
Rain chance (%)	74	76	85	75	80	79	78	60	37	35	31	29	24	9	16	56	76	43	49	37	56	55	46	51

Wind speed and direction

Wind & Wind gust
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Wind (m/s)	2.19	3.19	3.31	2.89	2.81	2.89	2.39	2.19	2.19	2.61	3.31	3.81	4.69	5.69	5.31	5.19	4.11	4.31	4.31	3.69	3.19	3.19	2.89	3.39
Wind gust (m/s)	3.03	4.31	4.81	4.11	4.22	4.19	3.53	3.42	3.5	4.22	5.42	6.22	7.31	7.5	7.22	5.81	6.83	6.72	7.14	6.42	5.81	6.22	6.11	6.03
Wind direction (°)	WSW 246°	WSW 239°	WSW 237°	SW 214°	SW 229°	SW 228°	SW 215°	SW 215°	SW 217°	SW 217°	SSW 211°	SSW 201°	SSW 204°	SW 230°	SW 236°	WSW 238°	SW 221°	SSW 197°	SSW 197°	SSW 196°	SSW 206°	SW 214°	SSW 204°	SW 218°

Air humidity

Humidity
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Humidity (%)	95	94	95	95	96	95	95	94	93	92	91	90	80	70	62	72	89	88	86	89	90	90	88	86

Atmospheric pressure

Pressure
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Pressure (mm Hg)	758	758	759	759	759	760	760	760	760	760	761	761	761	761	762	763	764	764	765	766	767	767	767	767

Ultraviolet index

UV Index
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
UV Index	0	0	0	0	0	0	0	0	0	0	0.1	0.3	1.1	1.7	1.7	1.1	0.7	0.2	0	0	0	0	0	0

Air quality & pollen

Air quality
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
PM2.5 (µg/m³)	6	3.5	3	2.6	1.7	1.2	1.5	1.8	2.7	3.1	3.9	4.5	5.2	4.4	3.4	3	3.2	3.7	3	3.8	3.8	3.6	3.2	3.1
PM10 (µg/m³)	6.3	3.6	3.7	2.7	1.8	1.5	2	2.6	3.3	4.2	5.4	5.7	6.6	5.6	5	4.9	4.4	4.6	4.8	5.1	4.8	5.6	4.1	4.2
Ozone (O₃) (µg/m³)	32	30	38	32	33	35	35	34	34	37	42	50	55	63	67	72	74	70	66	63	56	52	54	56
NO₂ (µg/m³)	11.7	9.4	7.5	6.5	5.3	5.2	6	8.5	13.3	16.6	12.3	10.1	5.9	4.3	3.3	3.3	3.4	5.1	7.3	10.9	13.1	14.3	14.4	11.6
SO₂ (µg/m³)	0.2	0.1	0.1	0.1	0.1	0.1	0.1	0.2	0.3	0.3	0.4	0.3	0.3	0.3	0.3	0.4	0.3	0.4	0.5	0.5	0.5	0.5	0.5	0.5
CO (µg/m³)	172	166	163	163	162	163	163	164	178	185	179	165	154	148	146	148	149	153	161	175	178	179	180	173

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Data Sources & Methodology

Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.

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5-day weather forecast Chêne-Bourg Oct 21, 2026

Forecast from 7 °C to 13 °C and precipitation