Monocacy River water temperature
Monocacy River, Dickerson, Maryland · River
The current water temperature at Monocacy River is 24.5 °C (as of September 21, 2026, source: USGS).
A river can change temperature within hours — snowmelt, rain or power-plant operations show up immediately. That is why the measured value counts here, not an estimate.
Measurement series & statistics
This measurement series includes 149 data points since July 23, 2026.
Lowest recorded value: 22.3 °C on September 8, 2026 · highest value: 28.8 °C on August 9, 2026.
In September, temperatures have ranged between 22.3 °C and 28.5 °C.
The current value is 1.2 °C below the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at Monocacy River right now?
The current water temperature is 24.5 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at Monocacy River?
Currently 24.5 °C (updated continuously).
How warm is at Monocacy River in September?
In September, the water temperature recently averaged 25.7 °C.
When is the water warmest at Monocacy River?
Across the measurement record, July is on average the warmest month (26.0 °C).
