Race-day weather · Wyndo for runners
Baystate Marathon weather
October 18, 2026 · Lowell, MA · scheduled start 8:00 AM (America/New_York). What the start usually feels like, year by year — and a live start-time read once the race is inside the 7-day forecast window.
Countdown
88 days to race day
The live race-day forecast unlocks 82 days from now, when October 18, 2026 enters the 7-day forecast window — a start-time read for the scheduled 8:00 AM start. Until then, live hourly data is not available; the history below shows what race morning usually looks like.
Typical start temp
44°F
median of 20 years
A warm year
48°F
75th percentile start temp
Rain at the start
10%
2 of 20 measured years
Race-morning weather history
Flat, cool mid-October double-loop along the Merrimack; a New England BQ-chaser staple, typically 40s F at start. Wyndo tracks what this calendar slot has actually served up at the start hour — temperature, dew point, wind, and rain — including the years when weather canceled or disrupted the race, and reads the live forecast for the start once race week arrives.
Median start temp
44°F
p75 (a warm year): 48°F
Median dew point
37°F
at the start hour
Rain at the start
10%
2 of 20 measured years
Warmest start
60°F
in 2017
Scroll sideways to see all columns.
| Year | Start temp | Dew point | Wind | Precip (start hr) | Day's high |
|---|---|---|---|---|---|
| 2025 | 43°F | 41°F | 4 mph | dry | 69°F |
| 2024 | 40°F | 34°F | 6 mph | dry | 75°F |
| 2023 | 47°F | 42°F | 8 mph | dry | 59°F |
| 2022 | 46°F | 43°F | 6 mph | dry | 67°F |
| 2021 | 54°F | 49°F | 9 mph | dry | 66°F |
| 2020 | 35°F | 33°F | 0 mph | dry | 60°F |
| 2019 | 38°F | 35°F | 4 mph | dry | 60°F |
| 2018 | 43°F | 34°F | 9 mph | 0.6 mm | 46°F |
| 2017 | 60°F | 60°F | 4 mph | dry | 75°F |
| 2016 | 44°F | 42°F | 7 mph | dry | 69°F |
| 2015 | 31°F | 22°F | 6 mph | dry | 44°F |
| 2014 | 48°F | 35°F | 11 mph | dry | 54°F |
| 2013 | 51°F | 40°F | 10 mph | dry | 63°F |
| 2012 | 46°F | 40°F | 6 mph | dry | 63°F |
| 2011 | 54°F | 38°F | 9 mph | dry | 63°F |
| 2010 | 44°F | 35°F | 7 mph | dry | 64°F |
| 2009 | 40°F | 36°F | 11 mph | 0.6 mm | 43°F |
| 2008 | 36°F | 28°F | 9 mph | dry | 50°F |
| 2007 | 54°F | 43°F | 7 mph | dry | 75°F |
| 2006 | 39°F | 32°F | 6 mph | dry | 56°F |
Slot climatology: each row is the weather at this race's usual calendar slot and start hour (ERA5 reanalysis at the start line) — including years when the edition was canceled or moved. A computed slot date is not a claim the race ran that day.
Your heat-adjusted goal for the marathon
The same cited model as the full calculator, pointed at this race: the median start-hour conditions this calendar slot has served up — climatology, not a forecast.
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Race facts
- Start line
- Tsongas Center (300 Martin Luther King Jr. Way), Lowell
- Scheduled start
- 8:00 AM (America/New_York) — All running divisions start 8:00 AM EDT; wheeled participants 7:55 AM (per official 2026 RunSignUp listing).
- Field size
- 2025 marathon finishers 1,140
- Registration
- open (2026 marathon sold out; first-come waitlist)
Wyndo is not affiliated with or endorsed by the Baystate Marathon (officially the "Hannaford Baystate Marathon, Half Marathon & Relay") or its organizers. Race names are used descriptively to identify the event; schedules and start times belong to the race — always confirm details on the official site. Weather guidance here is informational, never medical advice, and event alert flags on race day belong to the race's own medical team.