Weather
Climate Avg| Time | Temp | Dew Pt | Humidity | Wind | Conditions |
|---|---|---|---|---|---|
| Start | 56.8 – 58.7°F | 54° Nice | 85 – 91% | 9 mph SW | Clear sky |
| 8:00 AM | 57.2 – 59.7°F | 54° Nice | 78 – 89% | 9 mph W | Clear sky |
| Finish | 57.6 – 61.9°F | 54° Nice | 73 – 86% | 10 mph W | Partly cloudy |
Based on 3-year average for this date. Real forecast available in 313 days.
Elevation Profile
Course Stats
Mile Splits
| Mile | Grade |
|---|---|
| 1 | -0.2% |
| 2 | +1.9% |
| 3 | -1.6% |
| 4 | -0.3% |
| 5 | +0.1% |
| 6 | -0.3% |
| 7 | +3.0% |
| 8 | -3.1% |
| 9 | +4.5% |
| 10 | -3.6% |
| 11 | -0.5% |
| 12 | -0.2% |
| 13 | +0.3% |
| 14 | +6.4% |
RM Difficulty Index
Race-Day Weather History
Race-morning conditions on this date over the past 9 years: median 58°F with a 54°F dew point and 10 mph wind. 3 of 9 years were warm enough to slow race pace.
| Year | Temp | Dew Pt | Wind | Rain | Sky |
|---|---|---|---|---|---|
| 2025 | 58°F | 54°F | 10 mph | — | Partly cloudy |
| 2024 | 60°F | 56°F | 11 mph | — | Partly cloudy |
| 2023 | 60°F | 54°F | 7 mph | — | Partly cloudy |
| 2022 | 56°F | 52°F | 13 mph | — | Partly cloudy |
| 2021 | 56°F | 51°F | 14 mph | — | Partly cloudy |
| 2020 | 58°F | 53°F | 10 mph | — | Partly cloudy |
| 2018 | 61°F | 55°F | 12 mph | — | Partly cloudy |
| 2017 | 60°F | 56°F | 9 mph | — | Partly cloudy |
| 2016 | 58°F | 54°F | 6 mph | — | Partly cloudy |
Morning conditions (race window) on the San Francisco Half Marathon calendar date each year, from the ERA5 reanalysis archive — the race’s usual slot, not necessarily each edition’s exact day.
San Francisco Half Marathon Pace Calculator & Race Plan
The SF Half runs across the Golden Gate Bridge and through the Presidio with 267 meters of gain. That's a lot of climbing for a half marathon. July fog keeps temperatures cool but the hills are real.
This is a course where elevation-adjusted splits make a big difference. Even pacing isn't realistic with this much climbing.
San Francisco Half Marathon FAQ
When is the next San Francisco Half Marathon?›
The next San Francisco Half Marathon is on Sunday, July 25, 2027.
How long is the San Francisco Half Marathon?›
The San Francisco Half Marathon is 13.1 miles (21.097 km), the standard half marathon distance. It runs in San Francisco, CA.
How much elevation gain does the San Francisco Half Marathon have?›
The San Francisco Half Marathon has about 875 ft (267 m) of climbing and 838 ft of descent, with a maximum grade of 6.4%.
Is the San Francisco Half Marathon flat, downhill, or hilly?›
The San Francisco Half Marathon finishes 36 ft (11 m) higher than it starts and climbs 875 ft in total.
How hard is the San Francisco Half Marathon?›
Runner's Math scores the San Francisco Half Marathon 63/100 (Hard) — #3 of 16 half marathons in our library, ranked by modeled time cost. The profile costs about 2:09 versus a flat course for a runner at 4:00-marathon pace.
What's the weather usually like at the San Francisco Half Marathon?›
Over the past 9 years on this date, median race-morning conditions were 58°F with a 54°F dew point and 10 mph wind. 3 of 9 years were warm enough to slow race pace.