The biggest variable of Singapore Grand Prix weekend is Saturday afternoon. PlanetF1, Formula1.com and RacingNews365 all say rain could hit Saturday's Sprint (17:00 local, 09:00 UTC). For Sunday's race the outlets disagree, from a 10-20% chance to 40%.
Friday: mostly dry
RacingNews365 expects Friday's practice and Sprint Qualifying to be dry. PlanetF1 has 32C and sunny spells for practice, and about 29C and humid for night-time Sprint Qualifying with an early rain risk of around 20%. Formula1.com is slightly higher at 30% for the afternoon and early evening, and describes the wind as moderate, averaging 7.6 kph with gusts up to 25.2 kph.
Saturday: the Sprint is exposed
PlanetF1 expects a 40% chance of rain and thunder for the late-afternoon Sprint, and below 20% with a light breeze at around 28C for night-time qualifying. RacingNews365 says two rain cells are expected to converge on Singapore in the afternoon, so the 17:00 Sprint could be wet. Formula1.com gives 40% for Saturday afternoon and a heat index of at least 36-38C. Qualifying starts at 21:00 local (13:00 UTC), and RacingNews365 does not say whether rain is expected then.
Sunday: forecasts differ
PlanetF1 says storms could continue into Sunday daytime and wash away grip laid down over the weekend, but expects them to subside by the race with a 10-20% chance and around 29C. Formula1.com instead has 40% on Sunday, with a pop-up shower or thunderstorm possible in the mid-to-late afternoon. RacingNews365 expects rain south of Singapore to move away.
| Session | Local (UTC) | PlanetF1 | Formula1.com |
|---|---|---|---|
| Saturday Sprint | 17:00 (09:00) | 40%, with thunder | Saturday afternoon 40% |
| Saturday qualifying | 21:00 (13:00) | Below 20% | Saturday daily 40% (afternoon) |
| Sunday race | 20:00 (12:00) | 10-20% | Sunday 40% (mid-to-late afternoon) |
Humidity, wind and track temperature
According to RacingNews365, humidity will be in the 60s in the afternoons and rise to 83% at the planned Grand Prix start. Wind is consistently from the south, giving a tailwind into Turn 1. Formula1.com forecasts track temperature reaching 54-56C in the early-to-mid afternoon on Sunday before cooling considerably ahead of the race. Because the three outlets' numbers differ, check the latest forecast just before each session.