Your winter runs
Fill in what you know. Results update as you type, and a blank field only hides the part that needs it.
1 When
Any dates from 1 Nov 2026 to 31 Jan 2027.
2 Where
Pick a city, or type a latitude. South is negative, or add S.
Show times on my clock
Without these, times are solar time and the sun is highest at 12:00. A city fills them in.
3 The run
4 The forecast
One forecast for all your dates. Change it and everything below follows.
Pick a city or type a latitude to see sunrise, sunset and twilight for each date.
7-day plan
Daylight for each date
| Date | Sunrise | Sunset | Daylight | Civil twilight | Your run | Check |
|---|
Set the place, the dates and the forecast, then print the sheet.
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Pace rules you can edit
Your pace range is your easy pace plus a percentage. The percentage is the sum of one temperature row, one wind row and one surface row, multiplied by the share for your run type. Every number below is a box. Change it to match how you run. Bands are in °C and km/h, and anything you enter in °F or mph is converted first.
Layers for your comfort band
The checklist follows the feels-like temperature, which is the air temperature with the wind added, moved warmer or colder by the comfort band you picked.
Add a temperature and a wind speed (0 is fine) to build your layer checklist.
Dates, light, pace and layers on one printable sheet.
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How each number is worked out
Daylight
The standard sunrise equation, computed in this page from the date and your latitude. Sunrise and sunset use the sun at 0.833° below the horizon. Civil twilight uses 6°.
Pace
Your easy pace, plus the percentages in the three matching rows, times the run-type share. A temperature exactly on a band edge uses the colder band.
Dark check
Your start plus distance at the slow end of the pace range gives the finish. Starting before sunrise or finishing after sunset is flagged, with the minutes.
Want the worked example with every sum? Read winter running, daylight and pace at 51° N versus 34° S.
Plan the rest of the winter
Questions
Do I need to enter a longitude?
No. With only a latitude the times are solar time, where the sun is highest at 12:00. Add a longitude and a UTC offset, or pick one of the 40 cities, and the same days are shown on your own clock.
What is civil twilight?
The stretch of time when the sun is no more than 6 degrees below the horizon, so the sky is still bright. The planner lists it beside sunrise and sunset so you can see how much grey light surrounds each day.
What happens near the poles?
On dates when the sun does not rise the planner says so in plain words, lists any civil twilight window and marks the run as outside daylight. On dates when the sun does not set, every run time counts as daylight.
Can I change the pace adjustments?
Yes. Every percentage in the rule tables is a box you can edit, and the pace range recalculates as you type. Your edits travel in the link you copy, and one button puts the starting values back.
How is the layer checklist chosen?
From the feels-like temperature, which is the air temperature with the wind taken into account, shifted by the comfort band you choose: three degrees warmer if you run warm, three degrees colder if you feel the cold early.
Which dates does it cover?
Any dates from 1 November 2026 to 31 January 2027, up to 92 days at a time. The seven-day strip shows the first week of the dates you choose, and the table and CSV hold every date.
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