5-day weather forecast San Francisco Sep 15, 2026
14°Weather forecast San Francisco today Sep 15, 2026: sunny, temperature from 14 °C to 18 °C.
Precipitation probability 17%. Wind up to 6.69 m/s (gusts 8.39 m/s). Air humidity 68–88%, atmospheric pressure 758–760 mm Hg, UV index up to 6.2.
Weather Alerts
Small Craft Advisory issued September 14 at 8:32PM PDT until September 16 at 3:00AM PDT by NWS San Francisco CA
Small Craft Advisory
* WHAT...Northwest winds 15 to 25 kt with gusts up to 30 kt and
seas 8 to 11 ft.
* WHERE...Waters from Point Reyes to Pigeon Point 10-60 NM.
* WHEN...Until 3 AM PDT Wednesday.
* IMPACTS...Conditions will be hazardous to small craft.
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
Small Craft Advisory issued September 14 at 2:42PM PDT until September 15 at 3:00PM PDT by NWS San Francisco CA
Small Craft Advisory
* WHAT...Northwest winds 15 to 25 kt with gusts up to 30 kt and
seas 8 to 11 ft.
* WHERE...Waters from Point Reyes to Pigeon Point 10-60 NM.
* WHEN...Until 3 PM PDT Tuesday.
* 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 06:51
Sunset 19:18
Sunset 19:18
Waxing Crescent23% illuminated
Moonrise 12:00 · Moonset 21:39
Moonrise 12:00 · Moonset 21:39
Chart
Table
Tue, Sep 15, 2026
| Time | Weather | Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index |
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Clear | 15 °C | 14% | 24% | 88% | 758 mm Hg | WSW 256° 3.89 (5.53) m/s | 0 |
| 01:00 | Clear | 15 °C | 14% | 23% | 88% | 758 mm Hg | WSW 242° 3.11 (4.92) m/s | 0 |
| 02:00 |  Partly cloudy | 15 °C | 16% | 35% | 88% | 758 mm Hg | SW 221° 3 (4.39) m/s | 0 |
| 03:00 | Partly cloudy | 15 °C | 17% | 44% | 88% | 758 mm Hg | SW 226° 2.89 (4.39) m/s | 0 |
| 04:00 | Partly cloudy | 15 °C | 16% | 34% | 88% | 758 mm Hg | SSW 213° 3 (4.03) m/s | 0 |
| 05:00 | Clear | 15 °C | 14% | 21% | 87% | 758 mm Hg | SSW 199° 2.69 (3.42) m/s | 0 |
| 06:00 | Clear | 15 °C | 13% | 18% | 87% | 759 mm Hg | SSW 198° 2.69 (3.33) m/s | 0 |
| 07:00 | Partly cloudy | 14 °C | 14% | 26% | 87% | 759 mm Hg | SSW 201° 3 (3.61) m/s | 0 |
| 08:00 | Partly cloudy | 15 °C | 14% | 29% | 85% | 760 mm Hg | SSW 194° 2.69 (3.22) m/s | 0.3 |
| 09:00 | Partly cloudy | 15 °C | 12% | 29% | 81% | 760 mm Hg | S 188° 2.69 (3.22) m/s | 1 |
| 10:00 | Partly cloudy | 16 °C | 10% | 32% | 75% | 760 mm Hg | SSW 193° 2.81 (3.33) m/s | 2.4 |
| 11:00 | Partly cloudy | 17 °C | 11% | 49% | 71% | 760 mm Hg | SSW 209° 3.5 (3.81) m/s | 4.1 |
| 12:00 | Partly cloudy | 18 °C | 8% | 28% | 70% | 760 mm Hg | SW 214° 3.81 (4) m/s | 5.6 |
| 13:00 | Partly cloudy | 18 °C | 7% | 28% | 68% | 760 mm Hg | SW 225° 5.39 (8.39) m/s | 6.2 |
| 14:00 |  Sunny | 18 °C | 7% | 14% | 71% | 760 mm Hg | SW 228° 5.89 (6.11) m/s | 6 |
| 15:00 | Sunny | 18 °C | 7% | 12% | 72% | 759 mm Hg | SW 233° 6.5 (6.89) m/s | 4.9 |
| 16:00 | Sunny | 17 °C | 8% | 13% | 74% | 759 mm Hg | SW 235° 6.69 (7.22) m/s | 3.1 |
| 17:00 | Sunny | 17 °C | 9% | 16% | 77% | 759 mm Hg | WSW 238° 6.5 (6.92) m/s | 1.5 |
| 18:00 | Sunny | 16 °C | 11% | 16% | 80% | 758 mm Hg | WSW 238° 6.11 (6.72) m/s | 0.5 |
| 19:00 | Sunny | 16 °C | 12% | 15% | 83% | 759 mm Hg | WSW 238° 5.89 (6.64) m/s | 0 |
| 20:00 | Clear | 15 °C | 13% | 18% | 85% | 759 mm Hg | SW 236° 5.39 (6.11) m/s | 0 |
| 21:00 | Clear | 15 °C | 14% | 24% | 86% | 759 mm Hg | SW 236° 5.61 (6.42) m/s | 0 |
| 22:00 | Clear | 15 °C | 14% | 20% | 87% | 760 mm Hg | SW 230° 5.31 (6.17) m/s | 0 |
| 23:00 | Clear | 15 °C | 13% | 17% | 86% | 760 mm Hg | SW 224° 5.11 (6.22) m/s | 0 |
Tue, Sep 15, 2026
Frequently asked questions about the 5-day weather in San Francisco
What will the weather be like in San Francisco over the next 5 days?
Over the next 5 days in San Francisco the temperature is expected to range from about 14 to 18 °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 San Francisco?
The chance of rain in San Francisco over the next 5 days reaches 26%. 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 San Francisco?
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 San Francisco will be the warmest and which the coolest?
Over the next 5 days the temperature in San Francisco ranges from about 14 to 18 °C. Compare the warmest and coolest day on the temperature chart above.
Will it be windy in San Francisco over the next 5 days?
Over the next 5 days the wind in San Francisco picks up to 8 m/s. The windiest days are easy to spot on the wind chart above.
Which day of the week in San Francisco 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 26%) and light wind — easy to compare on the 5-day charts above.
How can I best use the 5-day forecast for San Francisco?
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.
Will I need an umbrella or sunscreen in San Francisco this week?
Rain reaches a 26% chance across the next 5 days, so pack something waterproof for the wettest of them — the daily strip above shows which. Today’s UV index peaks at 6.2; sunscreen is worth it from about 3 upwards.
San Francisco 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.