Tromsø recorded its warmest September on record at 11.2°C, about 3.2°C above average, with Finnmark also nearly 4°C above normal. Meteorologists link the anomaly to persistent warm southerly winds and the broader influence of climate change.

Although autumn has arrived across most of Sweden, meteorological summer persists along the coast between Skellefteå and Piteå, including Byske. SVT’s meteorologist says autumn is about two weeks later than the 30‑year average, and locals and tourists are enjoying the unusual warmth.

Idaho Fish and Game confirmed epizootic hemorrhagic disease (EHD) and bluetongue in deer across North Idaho’s Panhandle amid hot, dry conditions, with similar outbreaks reported in Eastern Washington and southeastern Montana. Officials report hundreds of sick or dead deer and expect cases to rise until a hard freeze reduces biting midge vectors.

A tropical night was recorded in Reipå, Meløy, Nordland on 12 September, with temperatures staying above 20°C and a minimum of 20.4°C—the latest such event ever measured in Northern Norway. September temperatures across the region are 4–5°C above normal, aided by warm southerly air, wind, and föhn effects.

Washington wildlife officials report outbreaks of epizootic hemorrhagic disease (EHD) and bluetongue in Eastern Washington deer, linked to hot, dry conditions that favor biting midges. Hunters and residents are urged to report sick or dead deer.

In Rovaniemi, a resident observed globeflowers (Trollius) blooming again in early September, an unusual second flowering for this early-summer species. The rare late bloom drew comment from a botany professor.

Lake Mývatn experienced its largest midge swarm in decades, with calm, warm conditions triggering an unusually early emergence that blanketed the lake’s surface.

Berry farm owners Bjarni and Hrafnhildur at Vellir in Svarfaðardal report that this year’s wild blueberry harvest has started unusually early, with three shipments already arriving for sale.

The snow patch at Gunnlaugsskarð in Esja melted out by early August 2025, marking one of the earliest disappearances on record, previously only in July of 1941 and 2010.

Grong and Namsskogan in Trøndelag have logged 13 straight days above 30 °C, breaking the 43-year Nesbyen record, amid a nationwide heatwave.

An unusual spring thaw in Hooper Bay, Alaska, has led to persistent ponding on roads due to inadequate drainage, prompting the city to use sandbags and cut drainage channels to manage the water.

Spring is late again this year. The tundra remains under snow cover, and the territory suitable for nesting is critically limited," says Vasily Baranyuk, an ornithologist with many years of experience, using satellite communication from the Tundra Peak field cordon.

The National Weather Service has issued its first-ever heat advisory for Alaska, covering Fairbanks as temperatures are expected to climb into the mid-80s this weekend.

Despite cooler weather in late May and early June, wild roses are blooming near Fairbanks, Alaska, only slightly later than usual, contrasting with previous observations of late blooming due to warmer temperatures.

Fishing on the Kenai and Russian rivers opened June 11, but as of the previous evening only one sockeye salmon had been counted at the Russian River weir—compared to more than 700 at this time last year.

Reykjavík’s temperature yesterday came within half a degree of the city’s May record amid warm, dry, and bright conditions, with similar weather expected until rain arrives Thursday.

Anchorage is experiencing the highest tree pollen counts in nearly a decade, with counts reaching thousands of grains per cubic meter from birch, poplar, cottonwood, aspen, willow, and alder, triggering widespread allergy symptoms.

A late-season blizzard dumped up to 30 cm of snow in northeastern Finland, snarling roads around Kuusamo and Salla and causing train delays between Parikkala and Joensuu due to a damaged electric rail track.

A historic late‐spring blizzard on May 2 blanketed Moscow with up to 15 cm of snow—the first May 2 snow cover in 75 years—toppling trees onto cars and cutting power for over 26,000 residents. The record snowfall came a day after Moscow was hit by record rainfall and an unusually mild winter. The capital city and its outer suburbs saw 71% of the precipitation usually recorded in May in just 36 hours.

A bloom of non-toxic Noctiluca algae is lining Saanich Inlet’s shoreline; safe for swimmers and shellfish consumption so far. Scientists say the bloom is not producing toxins yet, but could as the water gets warmer. “This one is a bit early!” said Galbraith.