5-day weather forecast Fairfax 05-08-2026

Weather forecast Fairfax Wednesday, August 5 05.08.2026: partly cloudy, temperature from 21 °C to 33 °C.

Precipitation probability 44%. Wind up to 5.19 m/s (gusts 7.89 m/s). Air humidity 45–99%, atmospheric pressure 763–765 mm Hg, UV index up to 8.

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MinorAug 1, 06:58 AM — Aug 1, 03:00 PMTranslate with Google

Small Craft Advisory issued August 1 at 6:58AM EDT until August 1 at 11:00PM EDT by NWS Baltimore MD/Washington DC

Small Craft Advisory

* WHAT...Southeast winds 10 to 15 kt expected with gusts up to 20 kt expected. * WHERE...Tidal Potomac River from Key Bridge to Cobb Island MD. * WHEN...From 2 PM this afternoon to 11 PM EDT this evening. * IMPACTS...Conditions will be hazardous to small craft.

Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions.

5 days at a glance — tap a day to open it

Sunrise 06:14
Sunset 20:16

Last Quarter44% illuminated
Moonrise 23:33 · Moonset 13:21

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Table

← Tue, Aug 4

Wed, Aug 5, 2026

Forecast from 21 °C to 33 °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)	22	22	22	21	21	21	21	21	22	23	26	28	30	32	33	33	31	30	31	29	28	27	26	26
Precipitation (mm/hr)	0.01	0.01	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.01

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	57	21	33	38	38	83	100	70	34	30	29	31	23	16	15	87
Rain chance (%)	44	43	42	42	43	43	42	42	22	12	9	6	5	9	10	6	4	4	4	5	5	6	8	19

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)	2.61	3	2.89	2.69	2.39	2.39	2.39	2.31	2.69	3	3.39	3.89	4.19	4.5	4.69	4.61	3.5	4.69	5.19	4.61	3.89	3.31	3.11	3.5
Wind gust (m/s)	4.14	4.72	4.56	4.39	3.97	4.06	4.06	3.75	3.94	3.92	3.92	4.5	4.83	5.17	5.42	5.72	5.67	7.5	7.89	7.64	6.67	6	5.83	6.11
Wind direction (°)	S 173°	S 178°	S 180°	S 190°	S 183°	S 175°	S 182°	S 183°	SSW 194°	SSW 199°	SSW 193°	S 190°	SSW 193°	SSW 195°	SSW 194°	SSW 192°	SSE 164°	SSE 165°	S 180°	S 188°	S 190°	S 185°	S 180°	SSW 193°

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 (%)	99	98	98	98	98	98	98	97	92	84	72	62	56	50	45	45	51	54	54	58	63	70	75	75

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)	764	764	764	764	764	764	764	764	765	765	764	764	764	764	764	763	763	763	763	763	763	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	0.1	0.6	6	7	7	7	7	7	7	8	8	8	7	7	0	0	0

← Tue, Aug 4

Wed, Aug 5, 2026

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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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