Night running

Night lighting dial#

Daylight, twilight and darkness around a workout.

The dial is a 24-hour clock of one night, from noon at the bottom, through 18 on the left, midnight at the top and 06 on the right, to the next noon. A workout before noon belongs to the night that ends that morning. Small marks are hours, longer marks every six hours.

The outer band shows how much daylight is left in the sky; it darkens in steps as the Sun sinks. The red ring inside marks the hours when you need lights. The thin silver ring is when the Moon is up.

The light level at your workout time and whether you need lights. The symbol shows the Sun up, twilight or night.

Under the dial: sunset, lights on (civil dusk), lights off (civil dawn) and sunrise for this night.

Light at selected time#

Whether lights will be needed at your start.

The light level in the usual twilight bands, the Sun's height (negative is below the horizon), and whether the Moon is up, how high and how much of it is lit. Once the Sun is more than 6° below the horizon you get a reminder to wear lights and reflective clothing.

Dusk and dawn#

The transitions into and out of darkness.

Sunset and sunrise are for a flat horizon. Dark is civil dusk: from then on it is too dark to see well without lights. First light is civil dawn the next morning. Hours needing lights is the time between them.

Near the poles in summer the Sun may never sink 6° below the horizon; there are then no hours needing lights by this measure, though it can still be dim.

Workout weather#

Weather over the planned workout.

The forecast for the hour of your workout and the two after it, from the best forecast source for your location (named under the table). Temperature shows a feels-like value when wind or humidity makes it differ by 2° or more. Rain is the chance of rain, or the amount when the source gives no chance. Units follow your settings.

Forecasts reach a limited number of days ahead; further out the section says the time is outside the forecast range.

Moonlight#

The Moon’s phase and position.

The Moon drawn as it looks, its phase and the share lit, and moonrise and moonset on the chosen date. A full Moon high in the sky lights open roads; a new Moon gives no light. Moonlight never replaces lights: drivers need to see you.

Lit streets and paths#

Explore local OpenStreetMap lighting tags.

Load lighting tags for mapped streets and paths within 750 metres of the chosen location. Gold marks explicitly mapped lit ways; red is mapped unlit, orange is conditional or limited lighting, and thin grey means the lighting tag is absent. The map is not live lamp status: lights can be broken, switched off or obscured.

Run/walk and Cycle exclude explicit activity prohibitions and private access unless an activity-specific permission is mapped. Cycling also excludes steps without explicit cycle permission. Missing access tags do not establish a right of way; inspect signs and conditional access. This is a map of individual segments, not a connected or recommended route.

The map summarises nearby lighting with colour-coded paths, lighting counts and a download timestamp. Show mapped-lit ways only hides unknowns; it does not verify their lighting. Recenter returns to the planning location. Results are capped at 600 segments and explicitly marked if partial. Your API server shares area downloads for seven days to conserve the free quota; older saved data is labelled if the source is unavailable. The download time is a retrieval time, not a live lamp check.

Fog and visibility#

Modelled visibility for the workout.

A supplementary Open-Meteo hourly forecast supplies horizontal visibility, air temperature, relative humidity and dew point. It is separate from the selected Workout weather provider. All readings follow the chosen planning location and time, in the chosen place’s local time; the actual model grid and retrieval time are shown.

Visibility below 1 km or a fog weather code flags Fog indicated. Visibility from 1 to below 5 km is marked Reduced visibility; 5 km or more is labelled with that range, not as a guarantee of clear conditions. Humidity alone does not establish fog. Temperature minus dew point is shown as a temperature difference in Celsius.

The road illustration is symbolic, not a measured headlamp beam. The 12-hour chart uses a logarithmic height scale capped at 20 km; the main number is uncapped. Missing visibility is shown as unavailable and gaps stay empty. Times outside the downloaded forecast are not replaced with older data. Refresh conditions downloads the latest available forecast.

Icy and wet surface outlook#

Weather-based surface conditions.

Set your planned workout duration from 15 minutes to four hours. The strip follows that interval, with the finish time, forecast coverage and minutes in each weather-check category. Missing hours remain unassessed; the card does not extrapolate beyond the forecast.

Freezing drizzle, freezing rain and freezing-fog codes flag possible icing. Snow codes or hourly snowfall flag snow. Air at or below 0°C with moisture also flags possible icing; air at or below 3°C triggers a cold-surface caution even with no precipitation signal. These are app heuristics, not official warnings or road-temperature measurements.

Precipitation in the current forecast hour or the six preceding hourly totals triggers a surface inspection reminder. This look-back does not model how quickly a surface dries. Open-Meteo precipitation and snowfall totals belong to the hour ending at their timestamp, so this card uses the next timestamp for the hour starting at the displayed time. No weather flag requires complete inputs and never means a surface is safe or dry. Bridges, shade, drainage and gritting are not modelled.