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)	13	13	13	13	13	13	13	13	13	13	13	14	14	14	14	14	14	14	14	14	14	14	14	14
Precipitation (mm/hr)	0	0	0	0	0.11	0.85	0.99	0.53	0.66	1.39	1.36	1.37	0.96	1.46	2.32	2.11	1.58	1.24	0.01	0	0.11	0	0	0

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	100	100	100	100	100	100	100	100	100	100	100	100	100	100
Rain chance (%)	31	31	30	31	43	73	77	67	70	79	80	79	77	80	85	84	81	78	44	42	54	43	43	43

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)	0.69	0.19	0.5	0.31	0.5	1	0.61	0.81	1.11	0.19	1	0.69	0.19	0.31	0.39	0.89	0.39	0.31	0.69	0.81	1	1.31	1.19	1.31
Wind gust (m/s)	1.22	0.61	0.92	1	1.14	1.83	0.92	2.5	2.92	1.11	2.22	1.61	0.83	0.39	0.72	1.42	0.61	0.61	1.31	1.11	1.31	2.22	1.42	1.81
Wind direction (°)	SE 137°	SSE 152°	E 96°	E 86°	ESE 123°	ENE 67°	NNE 12°	ENE 64°	ESE 106°	E 97°	E 90°	SE 124°	SSW 197°	N 9°	W 259°	WNW 286°	W 277°	WSW 258°	NW 309°	NW 307°	WNW 291°	WNW 285°	WNW 292°	WNW 294°

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 (%)	92	91	91	91	93	95	97	98	98	97	98	98	98	98	98	98	98	97	98	98	98	98	98	98

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)	768	768	767	767	767	767	767	767	767	767	767	767	766	766	765	764	764	764	764	764	764	764	764	764

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	0.1	0.2	0.3	0.2	0.5	0.4	0.5	0.2	0.1	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)	8.5	6.8	5.7	5.2	5	5	5	5.2	6	6.7	6.8	6.7	7	7.5	7.7	7	7.3	8.8	10.4	11.5	12.5	13.5	14.2	14.8
PM10 (µg/m³)	9.1	7.6	6.6	6.3	6.2	6.3	6.4	6.6	7.3	8	8.2	8.1	8.5	9.1	9.3	8.5	8.8	10.4	11.9	13	14	15.1	15.8	16.4
Ozone (O₃) (µg/m³)	41	49	54	56	57	56	54	50	48	48	49	50	51	52	52	52	51	48	42	33	26	20	15	12
NO₂ (µg/m³)	19.3	14	10	7.9	7.1	7	8	9.8	11.1	11.2	10.7	10.2	9.7	9.3	9.3	9.7	10.6	12.5	16.2	21	25.4	29.2	32.5	34.2
SO₂ (µg/m³)	2	1.7	1.4	1.3	1.4	1.4	1.4	1.5	1.5	1.4	1.3	1.3	1.4	1.5	1.7	1.8	2	2.2	2.4	2.7	3	3.3	3.5	3.7
CO (µg/m³)	250	202	166	152	149	148	146	146	149	158	170	176	169	157	149	149	154	163	179	199	218	235	250	258

← Sat, Oct 3

Sun, Oct 4, 2026

Mon, Oct 5 →

Fairfax on the map

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.

Learn more about our methodology →