RHMZ: 36 Degrees Wednesday, Rain Drops Serbia to 25
RHMZ forecasts Wednesday, September 9 as the hottest day at up to 36 degrees, with rain, thunderstorms and a drop to around 25 degrees across Serbia starting Thursday, September 10.

Is summer finally winding down? According to the Republic Hydrometeorological Service (RHMZ), yes, but not quite yet. Tuesday, September 8, still brings mostly sunny and warm weather, Wednesday is set to be the last real summer day, and only from Thursday does the reversal arrive that RHMZ officially marks as the end of the heat.
What the thermometer holds today
For Tuesday, RHMZ forecasts weak to moderate wind from the south and southeast. Overnight lows will range from 7 to 17 degrees, with daytime highs between 30 and 34. In Belgrade, mornings stay cool at 12 to 17 degrees before the day climbs to around 33. No precipitation is expected, and nothing changes from the pattern of recent days.
Wednesday is the peak, then it starts to break
On Wednesday, September 9, RHMZ forecasts a daily high of 32 to 36 degrees, making it the hottest day of the stretch. By late afternoon, clouds will already be building over western Serbia, the first sign that the system holding the heat in place is starting to retreat.
Thursday, the day RHMZ says summer ends
Starting Thursday, September 10, RHMZ forecasts rain and local thunderstorms across all of Serbia, along with stronger, cooler wind. The forecast for that day states, word for word:
“Frequent rain and local thundershowers with a drop in temperature.”
The temperature drop is worth breaking into two figures so they don’t get confused. On Thursday itself, temperatures fall from around 34 to around 25 degrees, a nine degree drop in a single day. Measured against Wednesday’s peak of up to 36, the gap by Thursday reaches eleven degrees. RHMZ marks that date, September 10, as the official end of the hot weather.
The rain doesn’t stop right away. It continues into Friday, September 11, bringing further cooling and wind that stays colder than it was during the hot stretch.
The weekend is where forecasts diverge
For Saturday and Sunday, September 12 and 13, forecasts don’t fully agree. One source says daytime temperatures through the end of the month will stay around 25 degrees, without giving a specific figure for that particular weekend, only noting it will be “noticeably more pleasant than early September.” Another source gives a concrete number for Saturday and Sunday: settled weather with a daytime high around 28 degrees and an overnight low around 16. Which figure ends up closer to the mark will become clearer as the forecast gets nearer to those dates, but both sources point the same way: after Thursday, there’s no going back to the heat.
Extreme fire danger holds until the shift
Until Thursday’s change in weather, an extreme fire danger warning remains in force for western and southeastern Serbia. Anyone planning a trip or outdoor work on Wednesday, the last hot day, should factor that in before the weather turns.
Who needs to be careful, according to the biometeorological forecast
RHMZ warns that the biometeorological situation may trigger the usual complaints among the chronically ill and sensitive individuals, with a specific caution for cerebrovascular patients, meaning people at heightened risk of stroke. If you fall into that group, or are looking after someone who does, these days of sharp swings in pressure and temperature are not the moment to skip a doctor’s visit or a regular course of therapy.
What the rest of September looks like
After Thursday, RHMZ forecasts daytime temperatures around 25 degrees and nighttime lows around 14 for the remainder of the month. That’s nearly ten degrees below what Serbia saw in the first week of September, when Sjenica dropped to as low as 3 degrees overnight even as daytime highs on Wednesdays were still climbing to 37.
A practical tip for this week
If you have outdoor plans, make the most of Wednesday. It’s the last day sunny weather can be taken for granted. From Thursday on, carry an umbrella and a light jacket rather than just a t-shirt, because a nine to eleven degree drop within a single day genuinely changes how the body feels, even for people who normally handle weather swings well.



