5-day weather forecast Fairfax 12-07-2026

Weather forecast Fairfax today 12.07.2026: sunny, temperature from 20 °C to 30 °C.

Precipitation probability 46%. Wind up to 4.39 m/s (gusts 8.28 m/s). Air humidity 48–95%, atmospheric pressure 761–767 mm Hg, UV index up to 8.

Sunrise 05:54
Sunset 20:35

New Moon2% illuminated
Moonrise 03:08 · Moonset 19:10

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Table

Sun, Jul 12, 2026

Mon, Jul 13 →

Forecast from 20 °C to 30 °C and precipitation

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)	23	23	23	23	23	23	23	23	23	24	25	29	28	29	29	30	30	29	28	24	23	22	21	20
Precipitation (mm/hr)	0.25	0	0	0	0	0	0.05	0	0.04	0	0	0	0	0	0	0	0	0	0	0.03	0.01	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 (%)	88	97	60	45	11	100	53	100	100	78	43	13	5	3	15	9	7	9	1	84	77	21	17	15
Rain chance (%)	46	33	26	23	15	38	31	32	36	23	14	7	4	3	3	2	2	2	2	22	19	11	10	10

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)	1.11	0.81	1.11	1.19	1.31	1.61	1.81	1.89	2.31	2.69	3.19	3.61	3.69	4.11	4.31	4.39	4.19	4	3.61	2.81	2.81	2.81	2.81	2.39
Wind gust (m/s)	2	1.44	1.97	2.17	2.39	2.89	3.22	3.22	3.53	4.06	4.75	5.92	6.53	7.64	8.28	5.58	5.83	5.94	5.64	4.64	5.14	5.31	5.33	4.56
Wind direction (°)	WNW 302°	W 277°	NW 310°	NW 315°	NW 322°	NNW 333°	NNW 340°	N 349°	NNE 13°	NNE 33°	ENE 57°	ENE 71°	E 79°	ENE 78°	E 89°	E 100°	ESE 107°	ESE 115°	ESE 122°	ESE 111°	E 97°	ESE 104°	ESE 104°	ESE 110°

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 (%)	91	88	92	92	93	95	94	90	93	87	81	71	66	57	53	51	49	48	48	79	80	80	80	80

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)	761	761	761	761	761	762	763	764	764	764	764	764	764	764	764	764	764	764	764	765	765	766	766	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	0.3	1	2.2	4.1	5.8	6.7	8	7.9	6	3.7	2	0.8	0.3	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)	11.1	11.5	11.6	12.4	12.4	11.8	11.3	10.7	7.2	5.3	5.7	5.9	5.6	5.6	5	5.3	5.2	6.2	7.4	8.9	9.9	11.3	12.6	13.3
PM10 (µg/m³)	11.2	11.6	11.6	12.5	12.5	11.9	11.4	10.8	7.4	5.6	6	6.6	6.3	6	5.4	6.3	6.4	7.9	9.5	11.3	12.3	13.8	15.3	16.1
Ozone (O₃) (µg/m³)	72	69	68	68	69	71	73	75	81	94	111	123	128	129	128	124	119	111	102	91	80	70	60	52
NO₂ (µg/m³)	18.1	16.7	15.2	13.7	12.2	11.1	10.9	11	10.6	9	6.8	5	3.8	2.9	2.3	1.9	1.8	2.3	3.6	5.5	7.8	11.2	15.1	17.5
SO₂ (µg/m³)	2.4	2.4	2.4	2.5	2.5	2.6	2.7	2.8	2.8	2.6	2.2	1.8	1.4	1.1	0.8	0.7	0.7	0.7	0.8	0.9	1	1.1	1.3	1.4
CO (µg/m³)	203	195	189	191	197	200	196	190	183	177	171	166	163	162	160	156	152	150	154	160	165	165	164	163

Sun, Jul 12, 2026

Mon, Jul 13 →

Frequently asked questions about the weather in Fairfax

Today in Fairfax the temperature ranges from 20 °C to 30 °C, wind up to 4.39 m/s. Check the detailed hourly forecast above for more information.

The precipitation probability in Fairfax today is 46%. View the full multi-day forecast above to see the rain chances for each upcoming day.

The wind speed in Fairfax today reaches up to 4.39 m/s with gusts up to 8.28 m/s. Check the detailed wind chart above for hourly wind data.

The air humidity in Fairfax today ranges from 48% to 95%. View the humidity chart above for hourly details.

The UV index in Fairfax today reaches up to 8. Check the UV index chart above for hourly values throughout the day.

The atmospheric pressure in Fairfax today ranges from 761 to 767 mm Hg. View the pressure chart above for hourly readings.

Cloud cover in Fairfax today reaches up to 100%. Check the cloud cover chart above for hourly details throughout the day.

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 →