5-day weather forecast Fairfax 02-08-2026

Weather forecast Fairfax tomorrow 02.08.2026: partly cloudy, temperature from 21 °C to 31 °C.

Precipitation probability 95%. Wind up to 4.39 m/s (gusts 6.86 m/s). Air humidity 38–98%, atmospheric pressure 757–760 mm Hg, UV index up to 2.1.

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MinorJul 31, 07:41 PM — Aug 1, 03:45 AMTranslate with Google

Small Craft Advisory issued July 31 at 7:41PM EDT until August 1 at 11:00PM EDT by NWS Baltimore MD/Washington DC

Small Craft Advisory

* WHAT...Southeast winds 10 to 15 kt with gusts up to 20 kt expected. * WHERE...Tidal Potomac River from Key Bridge to Cobb Island MD. * WHEN...From 2 PM to 11 PM EDT Saturday. * 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 06:11
Sunset 20:19

Waning Gibbous75% illuminated
Moonrise 22:17 · Moonset 10:12

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← Sat, Aug 1

Sun, Aug 2, 2026

Mon, Aug 3 →

Forecast from 21 °C to 31 °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)	24	24	23	22	22	21	21	21	22	24	26	28	29	31	31	31	29	29	29	27	25	23	21	21
Precipitation (mm/hr)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.09	0.38	0.85	1.32	11.41

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 (%)	45	49	24	18	18	28	39	29	48	29	15	14	16	45	46	44	44	44	44	50	85	79	53	99
Rain chance (%)	9	9	7	8	10	12	14	12	12	7	4	2	2	3	3	3	4	4	4	17	40	65	67	95

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)	4.11	3.89	3.69	3.19	3.11	3.11	3.11	3.11	3.5	3.89	4.19	4.39	4.19	3.89	3.19	2.19	0.61	0.89	0.69	0.61	0.81	1.81	2.11	1.39
Wind gust (m/s)	6.86	6.47	6.11	5.5	5.42	5.5	5.39	5.08	4.97	5	4.89	5.06	4.83	4.5	3.67	2.75	0.94	1.39	1.11	1.03	1.42	3.36	3.64	2.28
Wind direction (°)	SSE 165°	S 173°	S 178°	S 173°	S 171°	SSE 161°	SSE 164°	SSE 159°	SSE 163°	S 169°	S 169°	SSE 166°	S 170°	S 175°	S 180°	SSW 192°	SW 236°	ENE 67°	E 83°	SSE 168°	S 178°	WNW 300°	NW 324°	NW 310°

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 (%)	68	67	70	75	79	81	83	82	76	67	59	50	43	38	38	39	46	50	49	59	72	91	96	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)	759	759	759	759	760	760	760	760	760	760	760	759	759	759	758	758	758	757	757	758	758	758	758	758

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	0.4	0.5	0.7	1.1	2.1	1.2	2.1	0.9	0.4	0.3	0.2	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)	8.3	7.6	7.1	6.7	6.7	6.8	6.8	7	7.8	8.9	10	9.8	9.6	9.8	10	10.6	9.7	10	9.1	8.5	8.2	8.6	9.7	10.2
PM10 (µg/m³)	8.7	8.1	7.6	7.3	7.5	7.9	7.9	8.1	9.1	10.9	12.7	12.5	12	12.2	12.5	13.3	12.3	12.6	11.5	10.5	9.8	9.7	10.7	10.9
Ozone (O₃) (µg/m³)	79	76	74	72	71	70	68	67	70	81	97	109	114	115	114	111	106	99	91	81	71	59	46	38
NO₂ (µg/m³)	5.4	4.8	4.4	4.2	4.2	4.4	5.1	6	6.2	5	3.2	1.8	1.3	1.2	1.3	1.2	1.2	1.9	3.5	5.8	8.9	14	19.9	23
SO₂ (µg/m³)	2.6	2.8	2.9	2.8	2.7	2.6	2.6	2.7	2.7	2.7	2.6	2.5	2.5	2.5	2.4	2	1.5	1.1	0.9	0.9	0.9	1.1	1.3	1.5
CO (µg/m³)	138	135	132	131	130	130	131	133	134	132	128	124	121	118	117	118	120	122	124	127	129	131	133	133

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Sun, Aug 2, 2026

Mon, Aug 3 →

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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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