A worldwide heatwave is impacting numerous cities,with temperatures soaring into the 90s Fahrenheit as of September 7,2025. From Vientiane, Laos, to Ulan Bator, Mongolia, residents are bracing for continued high temperatures adn varying conditions ranging from brief showers to persistent rain.
This global weather pattern affects billions, impacting daily life, agriculture, and energy demands.Accurate forecasting is crucial for public safety and economic stability as communities prepare for potential heat-related illnesses, disruptions to travel, and strain on resources. The forecast, compiled by AccuWeather, provides a snapshot of conditions across diverse locations, offering insights into localized weather events and broader climate trends.
Here’s a city-by-city breakdown of the forecast as of September 7, 2025:
asia
Ulan Bator, Mongolia: Expect partly sunny and hot conditions with a high of 96°F (36°C) and a low of 77°F (25°C). Winds will be from the southeast at 7 mph, with 57% humidity, a 7% chance of precipitation, and a UV index of 7.
Vientiane, Laos: Brief morning showers are anticipated, with a high of 91°F (33°C) and a low of 77°F (25°C). A stray afternoon thunderstorm is possible. Winds will be from the southeast at 6 mph,humidity at 77%,a 91% chance of precipitation,and a UV index of 9.
Yangon, Myanmar: Periods of rain and drizzle are forecast, with a high of 87°F (31°C) and a low of 76°F (24°C). Winds will be from the southwest at 6 mph, humidity at 81%, a 96% chance of precipitation, and a UV index of 3.
Yerevan, Armenia: Sunshine and warm temperatures are expected, with a high of 87°F (31°C) and a low of 61°F (16°C). Winds will be from the northeast at 4 mph, humidity at 31%, a 3% chance of precipitation, and a UV index of 7.
Europe
Vienna, Austria: Conditions will be partly cloudy with sunshine, with a high of 78°F (26°C) and a low of 58°F (14°C). Winds will be from the west-northwest at 3 mph, humidity at 60%, an 8% chance of precipitation, and a UV index of 5.
Vilnius, Lithuania: Warm sunshine is predicted, with a high of 79°F (26°C) and a low of 57°F (14°C).Winds will be from the east at 7 mph, humidity at 61%, a 6% chance of precipitation, and a UV index of 4.
Warsaw, Poland: Mostly cloudy skies are expected, with a high of 77°F (25°C) and a low of 57°F (14°C). Winds will be from the east at 11 mph, humidity at 56%, a 12% chance of precipitation, and a UV index of 4.
North America
Vancouver, Canada: Morning showers are likely, transitioning to cloudy conditions, with a high of 72°F (22°C) and a low of 59°F (15°C). Winds will be from the north-northeast at 5 mph, humidity at 78%, a 39% chance of