Umbrellas are still out along the Lungotevere, jackets have been pulled out again in Trastevere, and the question Romans have been asking for weeks remains the same: when will the steady heat arrive?
The latest forecasts from ArcheoRoma and Meteolive.it predict another gray and cool week, but with a turnaround that this time is backed by the data: between May 20 and 22, Rome will see temperatures of 26–27 degrees and clear skies. First , however, we must weather the stormiest weekend of this spring.
Wednesday, May 13: rain and cool temperatures
Today begins with light rain starting in the morning and temperatures that, depending on the model consulted, range between 19°C and 21°C. The sky remains overcast, winds are moderate, and humidity remains high.
In the afternoon, some clearing is expected before conditions improve in the evening—but without changing the overall picture of an unstable day. If you need to go out, you’d better be prepared: an umbrella and an extra layer are still necessary.
Thursday, May 14, and Friday, May 15: variable, with no clear trend
Thursday brings a slight improvement with a high of 20°C, high humidity, and winds up to 24 km/h. It won’t be clear, but a few rays of sunshine might peek through in the afternoon, especially in the city’s more sheltered areas like Parioli or the Appio neighborhood.
Friday the 15th follows the same pattern: highs of 19–20°C, variable weather, no definitive respite from the bad weather.
The weekend of May 16–17: the final twist
Saturday the 16th and Sunday the 17th confirm a pattern of significant instability. Highs remain around 20°C, while lows drop to 11°C —temperatures more typical of March than mid-May. Atlantic disturbances continue to dominate, with moderate rain affecting both the capital and coastal towns, from Ostia to Civitavecchia.
The ECMWF model indicates a possible more significant deterioration on Saturday, May 16, with cold currents from the north and local hailstorms in Lazio, Umbria, and Tuscany. The likelihood of this scenario ranges between 45% and 55%: the unstable conditions are certain, but the exact intensity is not.
Any outdoor plans between Friday evening and Sunday (trips to the Castelli Romani, days at the beach, outdoor markets) should be considered high-risk.
The weather turnaround: May 19–22
Here, the forecast finally becomes encouraging. Starting Monday, May 19, the situation begins to change noticeably, and by Wednesday, May 20, the turnaround is clear: ArcheoRoma forecasts 26.4°C on May 20, 27.4°C on May 21 and 22, with sunny conditions and lows rising to 14–15°C.
This is the clearest sign of a high-pressure system taking hold over the central Mediterranean.
For Romans, this means finally being able to plan an outdoor lunch at Campo de’ Fiori, an aperitif with a view of the Lungotevere, or a first day at the beach in Fregene without the risk of coming home soaked.
⚠️ But be warned: after May 23, another slight drop in temperatures is expected, with highs returning to around 22–23°C—without this week’s intense bad weather, but also without the stability of the height of summer.
When will the steady heat finally arrive in Rome?
The answer everyone has been waiting for is now backed by the data: the first real spell of warm weather is expected between May 20 and 22, with temperatures of 26–27°C and sunny days. After that, a slight drop will bring highs back down to 22–23°C by the end of the month, though without the return of intense storms.
The lasting African heat—the kind that transforms Rome into a summer city, empties the neighborhoods toward Ostia and Fregene every weekend, and fills outdoor venues until late at night—will most likely arrive between late May and early June.
Until then, keep an eye on real-time updates: in such an unstable spring, the difference between sunshine and downpours can still change within a matter of hours.
