Environment Canada is forecasting a mixed week for Milton, with showers and a risk of thunderstorms today, a return of warm sunshine midweek and variable conditions through next Tuesday.
Showers, thunder risk and high humidex for Wednesday
Today’s outlook calls for mainly cloudy skies and a 40 per cent chance of showers this afternoon, with a noted risk of a thunderstorm. Winds are expected to become west at 20 km/h early this afternoon and the daytime high is forecast at 24 C. The humidex is projected to reach 31, raising the perceived temperature and the potential for discomfort during outdoor activities. The UV index is listed at 7 (high), so sun protection is still recommended during breaks in cloud.
Forecasters say tonight will remain mainly cloudy with another 40 per cent chance of showers and continued risk of thunder. Fog patches are expected to develop near midnight with a low of 15 C.
Warmer, sunnier days then a return to unsettled weather
Thursday is forecast to be mostly sunny in the morning, becoming a mix of sun and cloud in the afternoon. Fog patches are expected to dissipate in the morning, with winds shifting to the northwest at 20 km/h late in the morning. The high is forecast at 27 C, with the humidex again around 31 and a UV index of 8 (very high). Cloudy periods and a 30 per cent chance of showers are possible overnight with a low near 15 C.
Friday and Saturday are expected to be mainly sunny, with highs of 24 C on Friday and 25 C on Saturday. Friday night should be clear with a low of 11 C, while Saturday night will see increasing cloudiness and a low of 14 C.
Sunday forecasts show more unsettled conditions: cloudy with a 40 per cent chance of showers during the day, a high near 22 C, and another 40 per cent chance of showers overnight with a low around 16 C.
Looking to the start of next week, Monday should see a mix of sun and cloud with a high of 25 C and clear skies overnight near 13 C. Tuesday is forecast to be sunny with a high near 26 C.
- Wednesday: 40% chance of showers; risk of thunderstorms; high 24 C; humidex 31; UV 7 (high).
- Thursday: Sunny then mixed sun and cloud; high 27 C; humidex 31; UV 8 (very high).
- Weekend: Mostly sunny Friday and Saturday; cooler and cloudier with showers possible Sunday.
| Day | High | Night |
|---|---|---|
| Wed | 24 C (humidex 31) | Low 15 C; 40% chance of showers; fog near midnight |
| Thu | 27 C (humidex 31) | Low 15 C; 30% chance of showers |
| Fri | 24 C | Low 11 C; clear |
| Sat | 25 C | Low 14 C; increasing cloudiness |
| Sun | 22 C | Low 16 C; 40% chance of showers |
Local impact and advice for Milton residents
The combination of a relatively high humidex and the chance of thunderstorms calls for caution for those planning outdoor work, recreation or community events. The humidex reading near 31 means warmer-feeling conditions that can increase heat stress for vulnerable people — children, older adults and those with chronic health conditions. The higher UV indices on Wednesday and Thursday — 7 and 8 respectively — also warrant sunscreen, hats and limiting midday sun exposure where possible.
"Fog patches developing near midnight" — Environment Canada
Fog developing overnight could reduce visibility on local roads, so drivers are advised to allow extra travel time and use low-beam headlights until conditions improve. Thunderstorm risk this afternoon and evening means seeking shelter indoors if lightning is observed and keeping an eye on local alerts.
Milton residents with outdoor plans should monitor updates from Environment Canada and local emergency information. Day-to-day conditions are expected to shift quickly this week — from humid, unsettled weather early on to warmer, sunnier days midweek and another chance of showers by Sunday.
