Climate Overview
The climate in Arno is hot. The average annual temperature is 27°C and approximately 3441mm of precipitation falls per year. Arno receives a notable amount of rainfall throughout the year, including during its driest month. Arno sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Arno has relatively stable temperatures year-round, staying within a 2°C range. The warmest month is September, when average highs reach 28°C and the mean temperature sits around 27°C. March is the coolest month, with minimum temperatures around 26°C and an average of 27°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows.
Precipitation
Arno is a very wet location, receiving approximately 3441mm of precipitation annually, which averages out to around 287mm per month. The wettest month is May, averaging 336mm of rainfall. October and December also tend to see above-average precipitation. The driest month is February, with just 156mm. That's 180mm less than May, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.
Wind
Arno is moderately windy, with an average annual wind speed of 29km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 35km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in August, with average winds dropping to 22km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 13km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 34km/h in winter, 31km/h in spring, 25km/h in summer, 24km/h in autumn.
Seasons
89 days until Summer
It is currently spring in Arno, which began on March 20, 2026. Arno sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in September at around 28°C, while the coldest stretch bottoms out in March near 26°C. Summer is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 26 to 28°C. Rainfall is heavy, totalling around 876mm across the season with a monthly average of 292mm. Winds are strong, averaging 31km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 26 to 28°C. Rainfall is heavy, totalling around 906mm across the season with a monthly average of 302mm. Winds are moderate at around 25km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 26 to 28°C. Rainfall is heavy, totalling around 956mm across the season with a monthly average of 319mm. Winds are moderate at around 24km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 26 to 28°C. Rainfall is heavy, totalling around 703mm across the season with a monthly average of 234mm. Winds are strong, averaging 34km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
The table below shows monthly climate averages for Arno based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
