Weather
Climate Avg| Time | Temp | Dew Pt | Humidity | Wind | Conditions |
|---|---|---|---|---|---|
| Start | 51.6 – 60.1°F | 52° Nice | 71 – 96% | 5 mph NE | Partly cloudy |
| 8:00 AM | 55 – 61.1°F | 53° Nice | 63 – 95% | 5 mph NE | Partly cloudy |
| Finish | 58 – 65.2°F | 53° Nice | 54 – 96% | 6 mph NE | Clear sky |
Based on 3-year average for this date. Real forecast available in 287 days.
Elevation Profile
Course Stats
Mile Splits
| Mile | Grade |
|---|---|
| 1 | +0.3% |
| 2 | -0.1% |
| 3 | -1.0% |
| 4 | +0.0% |
| 5 | +1.4% |
| 6 | +0.1% |
| 7 | -1.8% |
| 8 | -0.3% |
| 9 | -0.2% |
| 10 | -0.1% |
| 11 | -0.1% |
| 12 | -0.2% |
| 13 | +0.0% |
| 14 | +0.0% |
RM Difficulty Index
Race-Day Weather History
Race-morning conditions on this date over the past 10 years: median 59°F with a 51°F dew point and 7 mph wind. 4 of 10 years were warm enough to slow race pace.
| Year | Temp | Dew Pt | Wind | Rain | Sky |
|---|---|---|---|---|---|
| 2025 | 63°F | 61°F | 4 mph | — | Drizzle |
| 2024 | 58°F | 56°F | 6 mph | 0.1" | Rain |
| 2023 | 58°F | 38°F | 6 mph | — | Clear |
| 2022 | 63°F | 62°F | 3 mph | 0.11" | Rain |
| 2021 | 60°F | 46°F | 5 mph | — | Partly cloudy |
| 2020 | 64°F | 59°F | 12 mph | — | Drizzle |
| 2019 | 50°F | 42°F | 10 mph | — | Partly cloudy |
| 2018 | 66°F | 64°F | 8 mph | — | Drizzle |
| 2017 | 56°F | 45°F | 19 mph | — | Partly cloudy |
| 2016 | 50°F | 34°F | 12 mph | — | Partly cloudy |
Morning conditions (race window) on the Brooklyn Half Marathon calendar date each year, from the ERA5 reanalysis archive — the race’s usual slot, not necessarily each edition’s exact day.
Brooklyn Half Marathon Pace Calculator & Race Plan
The Brooklyn Half starts in Prospect Park, runs through Flatbush, and finishes on the Coney Island boardwalk. It's mostly flat with some gentle hills in the park. May weather in Brooklyn is usually warm.
The boardwalk finish is exposed to wind and sun. Our splits account for the conditions and the park hills.
Brooklyn Half Marathon FAQ
When is the next Brooklyn Half Marathon?›
The next Brooklyn Half Marathon is on Saturday, May 15, 2027.
How long is the Brooklyn Half Marathon?›
The Brooklyn Half Marathon is 13.1 miles (21.097 km), the standard half marathon distance. It runs in Brooklyn, NY.
How much elevation gain does the Brooklyn Half Marathon have?›
The Brooklyn Half Marathon has about 150 ft (46 m) of climbing and 248 ft of descent, with a maximum grade of 7.8%.
Is the Brooklyn Half Marathon flat, downhill, or hilly?›
The Brooklyn Half Marathon is a net downhill course, dropping 98 ft (30 m) from start to finish, with 150 ft of climbing along the way.
How hard is the Brooklyn Half Marathon?›
Runner's Math scores the Brooklyn Half Marathon 25/100 (Moderate) — #15 of 16 half marathons in our library, ranked by modeled time cost. The profile costs about 0:04 versus a flat course for a runner at 4:00-marathon pace.
What's the weather usually like at the Brooklyn Half Marathon?›
Over the past 10 years on this date, median race-morning conditions were 59°F with a 51°F dew point and 7 mph wind. 4 of 10 years were warm enough to slow race pace.