Morning Fog and Rising Temperatures Expected in La Rioja. On Monday, La Rioja is forecast to experience morning fog in the mountains and a rise in temperatures. Cloud cover will increase during the day, with winds remaining light. See the full weather forecast for more details.
On Monday, May 18, 2026, residents of La Rioja will face variable weather: according to the Agencia Estatal de Meteorología (AEMET), morning fog and local dense fog banks are expected in the mountainous areas of the region. This forecast may affect road visibility and create additional challenges for drivers, especially in the first half of the day.
According to AEMET, cloud cover will change throughout the day: in the morning the sky will remain mostly clear or with occasional clouds, but by evening, denser clouds may develop due to daytime convection. The wind will be generally light, coming from the northwest or variable directions, which should not cause significant changes in weather conditions.
Temperatures in the region will gradually rise. In the main cities of La Rioja—Calahorra, Haro, and Logroño—nighttime lows will be around 7 degrees, while daytime temperatures will reach 21–22 degrees. This range is typical for mid-May and should be comfortable for most residents and visitors to the region.
For La Rioja, spring fog in the mountainous areas is a common phenomenon, especially during weak winds and nighttime temperature drops. In such conditions, drivers are advised to exercise caution on roads passing through the sierra. According to AEMET, rising temperatures in May are usually accompanied by an increase in sunny days, though local fog can persist in the morning hours. La Rioja is known for its diverse microclimate: while the weather in the lowlands may be clear, the mountains can remain humid and foggy. These features require attention when planning trips and outdoor work.
