EXTPRT
EXPERIMENTAL LONGRANGE FOR SÃO JOÃO DA MADEIRA
EXPERIMENTAL FORECAST OFFICE - PORTO METRO
05:22 UTC THU DEC 25 2025
Long-Range Forecast - São João da Madeira
Issued: 05:22 UTC Thursday, December 25, 2025 | Valid: 15 days
| Date | Conditions | Low | High | Notes |
|---|---|---|---|---|
| Dec 25 | Clear | 2°C | 11°C | Dry with light winds. Good day for outdoor activities. |
| Dec 26 | Clear | 1°C | 11°C | Slight chance of a brief shower. Pack warm layers, especially overnight. |
| Dec 27 | Clear | 3°C | 12°C | Dry, breezy at times (gusts to 35 km/h). Frost possible in sheltered areas before dawn. |
| Dec 28 | Clear | 4°C | 14°C | Dry and milder. Pleasant afternoon for walks or errands. |
| Dec 29 | Clear | 2°C | 14°C | Cool night, warm day. Frost possible in rural spots early. |
| Dec 30 | Clear | 3°C | 13°C | Dry and stable. Typical winter day—sunshine with crisp air. |
| Dec 31 | Overcast | 3°C | 8°C | Dry but cloudy. Cooler air moving in. Clouds may limit afternoon warmth. |
| Jan 1 | Light Drizzle | 2°C | 8°C | Brief drizzle possible (1.2 mm), mainly in morning. Roads may be slick. |
| Jan 2 | Light Drizzle | 0°C | 8°C | Drizzle possible, especially early. Wet-bulb near 0°C—patchy frost or icy spots possible overnight. |
| Jan 3 | Clear | 2°C | 7°C | Dry, brief light precip possible (0.3 mm). Breezy (gusts to 32 km/h). |
| Jan 4 | Clear | -1°C | 8°C | Frost likely. Wet-bulb -2°C—any moisture could briefly freeze. Clear skies, cold night. |
| Jan 5 | Light Drizzle | 4°C | 8°C | Light rain (7.6 mm) over many hours. Breezy (gusts to 49 km/h). Umbrella advised. |
| Jan 6 | Light Drizzle | 6°C | 10°C | Rain likely (23.2 mm), steady and prolonged. Wind gusts to 72 km/h. Avoid prolonged outdoor exposure. |
| Jan 7 | Light Drizzle | 6°C | 9°C | Lingering drizzle (12.3 mm), windy (gusts to 71 km/h). Roads may stay wet. |
| Jan 8 | Clear | 3°C | 9°C | Dry, brief trace of rain possible. Cooler night—frost possible again in open areas. |
Trend Summary
After a dry and relatively mild stretch through the weekend, a shift begins late December 31, bringing cloudier skies and cooler temperatures. From January 1 to 7, a wetter and windier pattern sets in, with multiple days of light drizzle and increasing winds, peaking around January 6. Rain amounts are not extreme but spread over long periods, which could lead to damp conditions and minor ponding on poorly drained surfaces.
Temperatures will fluctuate, but the most notable concern is the drop to near or just below freezing on the nights of January 2 and January 4. With wet-bulb temperatures at or below 0°C on those nights, any damp surfaces could briefly freeze, creating isolated slick spots—especially on grass, bridges, or shaded roads. Snow is not expected at sea level, but brief sleet or freezing drizzle cannot be ruled out in elevated rural areas on January 2 or 4, though accumulations would be negligible and short-lived.
From January 8, drier and calmer weather returns, but cold nights remain possible. Overall, the pattern shifts from dry and sunny to unsettled and damp in early January, then stabilizes again. No major storms are indicated, but the prolonged damp and wind around January 5–7 may affect outdoor plans.
Model trends have been stable in recent runs, with little change in temperature or precipitation timing. Confidence is moderate through January 5, then decreases slightly for the January 6–7 period due to uncertainty in exact rainfall duration and wind intensity.
Practical advice:
- Dry, sunny days from Dec 25–30 are ideal for outdoor activities.
- Pack layers and a light jacket starting Dec 31.
- From Jan 1–7, carry a raincoat or umbrella, and be cautious of damp, potentially slippery surfaces overnight.
- Protect plants or exposed pipes on nights of Jan 2 and Jan 4, when frost is likely.
Experimental forecast - not official guidance