5-day weather forecast Fairfax 12-08-2026

Weather forecast Fairfax today 12.08.2026: sunny, temperature from 24 °C to 36 °C.

Precipitation probability 29%. Wind up to 6.61 m/s (gusts 12.47 m/s). Air humidity 31–83%, atmospheric pressure 752–756 mm Hg, UV index up to 7.6.

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SevereAug 12, 02:25 AM — Aug 12, 10:00 AMTranslate with Google

Severe Thunderstorm Watch issued August 12 at 2:25AM CDT until August 12 at 10:00AM CDT by NWS Omaha/Valley NE

Severe Thunderstorm Watch

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 573 IN EFFECT UNTIL 10 AM CDT THIS MORNING FOR THE FOLLOWING AREAS IN IOWA THIS WATCH INCLUDES 8 COUNTIES IN SOUTHWEST IOWA FREMONT HARRISON MILLS MONTGOMERY PAGE POTTAWATTAMIE SHELBY IN WEST CENTRAL IOWA MONONA IN NEBRASKA THIS WATCH INCLUDES 23 COUNTIES IN EAST CENTRAL NEBRASKA BURT BUTLER DODGE DOUGLAS SARPY SAUNDERS WASHINGTON IN NORTHEAST NEBRASKA ANTELOPE BOONE CEDAR COLFAX CUMING KNOX MADISON PIERCE PLATTE STANTON THURSTON WAYNE IN SOUTHEAST NEBRASKA CASS LANCASTER OTOE SEWARD THIS INCLUDES THE CITIES OF ALBION, ASHLAND, BELLEVUE, BLAIR, BLOOMFIELD, CLARINDA, COLERIDGE, COLUMBUS, COUNCIL BLUFFS, CREIGHTON, CROFTON, DAVID CITY, DECATUR, DUNLAP, ELGIN, FARRAGUT, FREMONT, GLENWOOD, HAMBURG, HARLAN, HARTINGTON, LA VISTA, LAUREL, LINCOLN, LOGAN, LYONS, MACY, MAPLETON, MILFORD, MISSOURI VALLEY, NEBRASKA CITY, NELIGH, NIOBRARA, NORFOLK, OAKLAND, OMAHA, ONAWA, OSMOND, PAPILLION, PENDER, PIERCE, PLAINVIEW, PLATTSMOUTH, RANDOLPH, RED OAK, SCHUYLER, SEWARD, SHENANDOAH, SIDNEY, ST. EDWARD, STANTON, TABOR, TEKAMAH, VERDIGRE, WAHOO, WALTHILL, WAUSA, WAYNE, WEST POINT, WINNEBAGO, WISNER, WOODBINE, AND YUTAN.

ModerateAug 11, 11:48 AM — Aug 12, 04:00 AMTranslate with Google

Heat Advisory issued August 11 at 11:48AM CDT until August 13 at 8:00PM CDT by NWS Kansas City/Pleasant Hill MO

Heat Advisory

* WHAT...Heat index values up to 106 expected. * WHERE...In Kansas, Doniphan County. In Missouri, Caldwell, Livingston, Andrew, Buchanan, Clinton, De Kalb, and Holt Counties. * WHEN...Until 8 PM CDT Thursday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

ModerateAug 11, 08:46 PM — Aug 12, 05:00 AMTranslate with Google

Heat Advisory issued August 11 at 8:46PM CDT until August 13 at 8:00PM CDT by NWS Kansas City/Pleasant Hill MO

Heat Advisory

* WHAT...Heat index values up to 105. * WHERE...Portions of northeast Kansas and north central, northeast, and northwest Missouri. * WHEN...Until 8 PM CDT Thursday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

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

Sunrise 06:29
Sunset 20:23

New Moon0% illuminated
Moonrise 05:53 · Moonset 20:24

Chart

Table

Wed, Aug 12, 2026

Thu, Aug 13 →

Forecast from 24 °C to 36 °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)	26	26	25	25	25	25	24	24	25	26	28	32	34	35	35	36	36	36	36	35	33	30	26	25
Precipitation (mm/hr)	0	0	0	0	0	0	0	0	0.18	0	0	0	0	0	0	0	0	0	0	0	0	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 (%)	0	0	0	0	0	0	0	0	75	0	0	1	1	0	1	0	1	45	28	45	44	15	10	23
Rain chance (%)	9	10	9	9	8	6	6	7	29	8	5	4	3	2	2	2	2	3	2	3	3	2	4	5

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)	6.61	6.31	5.69	4.19	4.19	2.5	4.39	3.89	2.19	1.81	2.19	2.81	3	2.89	3	3.19	2.89	2.81	4	2.69	1.5	2.89	2.11	1.89
Wind gust (m/s)	12.47	11.86	10.94	8.58	8.83	5.25	9.08	8.03	4.06	2.72	2.53	3.22	3.44	3.33	3.44	3.67	3.33	3.89	5.56	4.28	3.14	6.08	4.42	4
Wind direction (°)	S 191°	SSW 192°	SSW 196°	SSW 196°	S 179°	WSW 242°	NNW 332°	NNE 14°	NNE 17°	SE 128°	SSW 212°	WSW 247°	WNW 300°	NNW 343°	N 8°	NNE 14°	N 355°	NNE 24°	NE 41°	NNE 24°	NNE 21°	S 188°	S 178°	SE 124°

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 (%)	81	83	81	80	77	73	72	74	77	76	69	65	58	54	53	51	50	31	31	35	37	44	59	63

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)	753	753	753	753	752	753	755	755	755	755	754	754	755	754	754	754	754	754	753	753	754	755	755	756

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	0.5	1.4	2.8	5	6.6	7.6	6.9	5.6	3.8	2.1	1.2	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)	3.8	3.8	3.8	3.9	3.9	3.9	4	4	3.8	3.8	4.5	5.3	5.8	6.2	6.3	6.2	6	5.7	5.3	4.7	4.5	4.7	4.8	4.7
PM10 (µg/m³)	4.9	4.8	4.9	4.9	4.9	4.9	5	5	4.8	4.8	5.8	6.9	7.7	8.1	8.2	8	7.8	7.5	6.8	6	5.7	5.9	6	5.9
Ozone (O₃) (µg/m³)	66	68	67	66	63	58	51	49	53	61	70	80	92	101	107	111	111	105	94	83	72	62	53	48
NO₂ (µg/m³)	5.7	4.7	4.4	4.5	4.7	5.4	6.2	6.5	5.7	4.2	3	2.2	1.7	1.3	1	0.9	1.2	2.1	3.4	5.2	7.7	10.5	13	14.9
SO₂ (µg/m³)	0.6	0.6	0.6	0.7	0.7	0.7	0.7	0.7	0.7	0.6	0.6	0.6	0.7	0.7	0.7	0.7	0.7	0.7	0.6	0.6	0.6	0.7	0.8	0.8
CO (µg/m³)	122	119	118	117	117	117	117	117	117	118	117	115	112	110	108	107	107	111	117	122	123	123	123	124

Wed, Aug 12, 2026

Thu, Aug 13 →

Frequently asked questions about the 5-day weather in Fairfax

Over the next 5 days in Fairfax the temperature is expected to range from about 20 to 43 °C. See the detailed hourly forecast for each of the 5 days in the charts above.

The chance of rain in Fairfax over the next 5 days reaches 78%. Check the 5-day precipitation chart above to see exactly which days and hours bring rain.

A 5-day forecast is fairly reliable: the first 2–3 days are usually very accurate, while days 4–5 may be refined. The data is updated several times a day, so check back before important plans.

Over the next 5 days the temperature in Fairfax ranges from about 20 to 43 °C. Compare the warmest and coolest day on the temperature chart above.

Over the next 5 days the wind in Fairfax picks up to 9 m/s. The windiest days are easy to spot on the wind chart above.

For a walk or a trip, pick the days with the lowest chance of rain (up to 78%) and light wind — easy to compare on the 5-day charts above.

The first 2–3 days are reliable enough for firm decisions, while days 4–5 are a guide that sharpens as they approach. The forecast is updated several times a day, so check again before important plans.

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 →