法国即时天气 — Instant Weather › Climate & 8 Months

即时天气 — Instant Weather — Seasonal Trends and Climate Summaries

The Climate observatory explores long-term atmospheric evolution: 8-month seasonal projections for France, global oceanic cycles (ENSO, NAO) and annual temperature departures compared with past decades.

Long-Range Seasonal Projections and Oceanic Cycles

Month-by-month seasonal trends over 8 months

Seasonal projections estimate whether upcoming months are likely to be warmer, cooler, drier or wetter than average across France.

Influence of El Niño, La Niña and the North Atlantic Oscillation

Sea surface temperature anomalies (ENSO in the Pacific) and the North Atlantic Oscillation (NAO) shape jet stream patterns and European winter/summer regimes.

Temperature evolution in France since the 20th century

Annual trend charts illustrate rising mean temperatures, fewer lowland frost days and the increasing frequency of summer heatwaves.

Frequently Asked Questions — Climate & 8 Months

How can a seasonal outlook project several months ahead?

Unlike air masses that change rapidly, oceans, sea ice and soil moisture possess strong thermal inertia that influences atmospheric circulation over several months.

What is the North Atlantic Oscillation (NAO)?

It measures the pressure difference between the Azores High and the Icelandic Low: a positive winter phase brings mild wet oceanic flow to France, while a negative phase favors cold outbreaks.

What does the thermal anomaly in degrees (°C) measure?

It measures the difference between the average temperature observed over a month or year and the 1991–2020 reference normal.