5-day weather forecast Fairfax 20-08-2026
Weather forecast Fairfax today 20.08.2026: sunny, temperature from 18 °C to 31 °C.
Precipitation probability 75%. Wind up to 4.19 m/s (gusts 9.61 m/s). Air humidity 30–95%, atmospheric pressure 760–764 mm Hg, UV index up to 7.7.
5 days at a glance — tap a day to open it
Sunrise 06:37
Sunset 20:12
Sunset 20:12
First Quarter58% illuminated
Moonrise 15:37 · Moonset Does not set today
Moonrise 15:37 · Moonset Does not set today
Chart
Table
Thu, Aug 20, 2026
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Heavy rain at times | 20 °C | 72% (1.2 mm/hr) | 87% | 90% | 761 mm Hg | ENE 58° 3 (5.61) m/s | 0 |
| 01:00 |  Patchy rain possible | 20 °C | 69% (1.2 mm/hr) | 81% | 88% | 761 mm Hg | ENE 64° 3.31 (6.92) m/s | 0 |
| 02:00 | Patchy rain possible | 20 °C | 72% (1.2 mm/hr) | 86% | 91% | 761 mm Hg | ENE 62° 3.19 (6.19) m/s | 0 |
| 03:00 | Patchy rain possible | 19 °C | 74% (1.2 mm/hr) | 78% | 90% | 761 mm Hg | E 83° 2.69 (4.5) m/s | 0 |
| 04:00 | Patchy rain possible | 19 °C | 74% (1.2 mm/hr) | 70% | 92% | 761 mm Hg | ESE 104° 2.39 (3.22) m/s | 0 |
| 05:00 | Patchy rain possible | 18 °C | 75% (1.2 mm/hr) | 71% | 94% | 762 mm Hg | E 96° 1.89 (2) m/s | 0 |
| 06:00 |  Mist | 19 °C | 19% | 0% | 94% | 762 mm Hg | ESE 120° 1.39 (1.39) m/s | 0 |
| 07:00 |  Mist | 19 °C | 19% | 0% | 95% | 763 mm Hg | E 87° 1.5 (1.5) m/s | 0 |
| 08:00 |  Partly cloudy | 19 °C | 20% | 48% | 93% | 763 mm Hg | E 94° 1.31 (1.64) m/s | 0.5 |
| 09:00 |  Cloudy | 20 °C | 23% | 80% | 87% | 764 mm Hg | SE 128° 1.5 (1.61) m/s | 1.5 |
| 10:00 |  Sunny | 22 °C | 9% | 5% | 79% | 764 mm Hg | S 185° 2.19 (2.44) m/s | 2.9 |
| 11:00 | Sunny | 24 °C | 5% | 5% | 65% | 764 mm Hg | SE 138° 2.31 (7.31) m/s | 5 |
| 12:00 | Sunny | 26 °C | 2% | 5% | 52% | 763 mm Hg | ESE 111° 2.31 (2.39) m/s | 6.7 |
| 13:00 | Sunny | 28 °C | 1% | 2% | 41% | 763 mm Hg | ESE 109° 2.61 (2.61) m/s | 7.7 |
| 14:00 | Sunny | 30 °C | 1% | 5% | 35% | 762 mm Hg | ESE 120° 2.39 (5.39) m/s | 7.6 |
| 15:00 | Sunny | 31 °C | 1% | 0% | 32% | 762 mm Hg | SE 132° 2.31 (6.31) m/s | 6.4 |
| 16:00 | Sunny | 31 °C | 0% | 0% | 30% | 761 mm Hg | SE 140° 2 (6) m/s | 4.5 |
| 17:00 | Sunny | 31 °C | 0% | 0% | 30% | 761 mm Hg | SSE 151° 1.69 (6.69) m/s | 2.6 |
| 18:00 | Sunny | 31 °C | 0% | 0% | 31% | 761 mm Hg | SSE 157° 2.39 (2.61) m/s | 1.1 |
| 19:00 | Sunny | 31 °C | 1% | 0% | 40% | 760 mm Hg | SSE 157° 3.11 (4.81) m/s | 0.3 |
| 20:00 |  Overcast | 28 °C | 11% | 100% | 45% | 761 mm Hg | SSE 166° 3.5 (4.5) m/s | 0 |
| 21:00 |  Overcast | 26 °C | 11% | 100% | 48% | 761 mm Hg | SSE 148° 3.5 (4.61) m/s | 0 |
| 22:00 | Overcast | 26 °C | 11% | 100% | 49% | 761 mm Hg | ESE 122° 4.19 (9.61) m/s | 0 |
| 23:00 |  Light rain shower | 24 °C | 25% (0.16 mm/hr) | 100% | 63% | 763 mm Hg | ENE 59° 2.89 (2.92) m/s | 0 |
Thu, Aug 20, 2026
Frequently asked questions about the 5-day weather in Fairfax
What will the weather be like in Fairfax over the next 5 days?
Over the next 5 days in Fairfax the temperature is expected to range from about 18 to 34 °C. See the detailed hourly forecast for each of the 5 days in the charts above.
On which of the next 5 days will it rain in Fairfax?
The chance of rain in Fairfax over the next 5 days reaches 75%. Check the 5-day precipitation chart above to see exactly which days and hours bring rain.
How accurate is the 5-day weather forecast for Fairfax?
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.
Which of the next 5 days in Fairfax will be the warmest and which the coolest?
Over the next 5 days the temperature in Fairfax ranges from about 18 to 34 °C. Compare the warmest and coolest day on the temperature chart above.
Will it be windy in Fairfax over the next 5 days?
Over the next 5 days the wind in Fairfax picks up to 10 m/s. The windiest days are easy to spot on the wind chart above.
Which day of the week in Fairfax is best for a walk or a trip?
For a walk or a trip, pick the days with the lowest chance of rain (up to 75%) and light wind — easy to compare on the 5-day charts above.
How can I best use the 5-day forecast for Fairfax?
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.