Runn Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Runn Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Runn Lake today is 12.4°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 54°F (12°C) to 60°F (15°C). The water is significantly warmer, and swimming becomes possible for most people. However, caution may still be required for prolonged stays in the water, as extended exposure can cause discomfort. This is a suitable temperature range for short swims and for those accustomed to cooler water. For more comfortable swimming, it is recommended to use proper gear. It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| SEP 14 | 13.5°C | 17.0°C | |
| SEP 15 | 13.5°C | 17.0°C | |
| SEP 16 | 13.3°C | 17.0°C | |
| SEP 17 | 13.0°C | 17.0°C | |
| SEP 18 | 12.8°C | 17.0°C | |
| SEP 19 | 12.8°C | 17.0°C | |
| SEP 20 | 12.7°C | 17.0°C | |
| SEP 22 | 17.0°C | 12.6°C | |
| SEP 23 | 17.0°C | 12.9°C | |
| SEP 24 | 17.0°C | 13.1°C | |
| SEP 25 | 17.0°C | 13.3°C | |
| SEP 26 | 17.0°C | 13.6°C | |
| SEP 27 | 17.0°C | 13.8°C | |
| SEP 28 | 17.0°C | 14.0°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 0°C | 2°C | 5°C |
| February | 0°C | 2°C | 5°C |
| March | 0°C | 3°C | 6°C |
| April | 1°C | 5°C | 9°C |
| May | 6°C | 11°C | 17°C |
| June | 12°C | 18°C | 23°C |
| July | 13°C | 19°C | 24°C |
| August | 14°C | 20°C | 25°C |
| September | 11°C | 17°C | 22°C |
| October | 5°C | 9°C | 12°C |
| November | 1°C | 5°C | 8°C |
| December | 0°C | 3°C | 6°C |
Runn Lake: Water Temperature by Location
Runn Lake: Weather Forecast
September 21
September 22
September 23
September 24
September 25
September 26
Location & Local Information
Lake Runn (Swedish: Runn) in Dalarna County experiences pronounced seasonal variation in water temperature. In winter the surface typically sits around 0–1 °C (32–34 °F) and the lake often freezes, while spring warming in May and early June sees temperatures in the range of about 4–10 °C (39–50 °F). During the main bathing season in June through August surface temperatures commonly reach 15–24 °C (59–75 °F), with the warmest readings in shallow bays or during heat waves. In autumn the water cools again to roughly 8–15 °C (46–59 °F) before ice returns. Local conditions, wind and sunlight mean temperatures can vary noticeably between exposed open water and sheltered inlets.
Swimming in Runn is allowed and is a popular summer activity, supported by beaches, piers and designated bathing spots around the lake. Water quality is generally assessed by local authorities and posted where necessary, so swimmers are advised to follow local advisories about algal blooms or pollution. In winter the frozen surface enables ice activities and some people practise ice dipping, but that carries added risk and requires proper safety measures; free swimming on open water outside the warmer months is limited by cold temperatures and safety considerations.