Water Temperature of the St. Croix River in Calais, ME

Current Water Temperature

33.3°F

Measurement Time: Wednesday, December 3, 2025, 9:45 AM EST

Temperature Locations

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Local Points of Interest

St. Stephen, NB

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St. Croix River

Station Name: St. Croix River at Milltown, Maine
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 62 feet / 19 meters

Nearest Address:
531 North St
Calais, ME 04619
Washington County

GPS Coordinates: 45.17, -67.2966667

Nearby Water Temperatures

Lewy Lake, Princeton, ME (14.2 mi)
Grand Lake Stream, Grand Lake Stream, ME (23.5 mi)
Gulf of Maine, Eastport, ME (23.9 mi)
Narraguagus River, Cherryfield, ME (49.8 mi)
Penobscot River, Eddington, ME (72.4 mi)
Meduxnekeag River, Houlton, ME (74.0 mi)
Piscataquis River, Guilford, ME (98.3 mi)
Ducktrap River, Lincolnville, ME (104.2 mi)
Sheepscot River, Whitefield, ME (130.4 mi)
Gulf of Maine, Monhegan, ME (142.9 mi)
Allagash River, Allagash, ME (156.6 mi)
St. John River, Saint Francis, ME (157.1 mi)
Gulf of Maine, Portland, ME (179.1 mi)
Gulf of Maine, Cape Elizabeth, ME (180.7 mi)
Wild River, Gilead, ME (188.5 mi)

Weather for Calais, Maine

Current Weather

28.9°F
Sunny
Conditions: Sunny
Humidity: 83%
Feels Like: 21.7°F
Wind: NNW 7.2 mph
Wind Gusts: 9.3 mph
Pressure: 29.83 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 6 mi
UV Index: 0.1

Five Day Weather Forecast

Moderate or heavy snow showers
Wed
H: 32°F
L: 24°F
Overcast
Thu
H: 39°F
L: 19°F
Sunny
Fri
H: 23°F
L: 11°F
Partly Cloudy
Sat
H: 28°F
L: 15°F
Mist
Sun
H: 33°F
L: 20°F

Air Quality

AQI: 1 - Good
PM2.5: 2.64 μg/m3
PM10: 2.64 μg/m3
Carbon Monoxide: 193.84 μg/m3
Nitrogen Dioxide: 6.54 μg/m3
Sulphur Dioxide: 1.94 μg/m3
Ozone: 72 μg/m3

Astronomical

Sunrise: 6:51 AM
Sun Transit: 11:19 AM
Sunset: 3:48 PM
Daylight: 8 hrs 57 mins
Moonrise: 2:21 PM
Moon Transit: 10:24 PM
Moonset: 5:17 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 98.1%

Best Times for Fishing or Hunting

Major Periods

12:32 AM - 3:02 PM
12:00 AM - 12:00 AM

Minor Periods

1:51 PM - 3:21 PM
4:47 AM - 6:17 AM

Action Rating: 3 out of 5

special weather statement in effect

Service Notice – November 2025: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 2025, changes are expected to include... 1) ECCC's initiative to upgrade the presentation of alerts into Colour-Coded Weather Alerts is tentatively set for deployment November 26, 2025. Data changes will appear in CAP following this deployment, 2) the alert name ‘extreme cold warning’ will change to ‘cold warning’, 3) two Public zone names will change in Saskatchewan, 4) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard continues, there will be changes coming to CAP and 5) other minor improvements and corrections. For more information on these changes: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/ | Notification de service – novembre 2025: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour 2025, il y aura des changements incluant... 1) l'initiative d'ECCC visant à améliorer la présentation des alertes sous forme d'alertes météorologiques codées par couleur est provisoirement prévue pour un déploiement le 26 novembre 2025. Des changements aux données apparaîtront dans le PAC suite à ce déploiement, 2) le nom de l’alerte ‘avertissement de froid extrême’ changera pour ‘avertissement de froid’, 3) deux noms de zones publiques seront modifiés en Saskatchewan, 4) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique se poursuit. Des changements seront également apportés au PAC et 5) d’autres améliorations et corrections mineures. Pour plus d’informations sur ces changements: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/

Effective: Tue December 2, 2025, 8:42 PM
Expires: Wed December 3, 2025, 12:42 PM

Snow expected tonight. Locations: parts of southern New Brunswick. Total snowfall: 10 to 15 cm, possibly more over parts of southeastern New Brunswick, including the Moncton area. Time span: until Wednesday morning. Remarks: The heaviest snow is expected to fall overnight. The highest snowfall amounts will likely occur over southeastern New Brunswick, especially over higher terrain. Less snow is expected along the Fundy coast where precipitation will fall partially as rain. Accumulations of snow and ice may create slippery and hazardous travel conditions. Consider adjusting travel plans to avoid the most adverse conditions. ### Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to NBstorm@ec.gc.ca or post reports on X using #NBStorm. For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.


special weather statement in effect

Service Notice – November 2025: The Environment and Climate Change Canada (ECCC) CAP Service undergoes changes from time to time as the business of alerting evolves. For 2025, changes are expected to include... 1) ECCC's initiative to upgrade the presentation of alerts into Colour-Coded Weather Alerts is tentatively set for deployment November 26, 2025. Data changes will appear in CAP following this deployment, 2) the alert name ‘extreme cold warning’ will change to ‘cold warning’, 3) two Public zone names will change in Saskatchewan, 4) ECCC's initiative to introduce free-form polygons to represent the true threat area of a weather hazard continues, there will be changes coming to CAP and 5) other minor improvements and corrections. For more information on these changes: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/ | Notification de service – novembre 2025: Le service du PAC d’Environnement et Changement climatique Canada (ECCC) subit périodiquement des changements à mesure que le système d’alerte évolue. Pour 2025, il y aura des changements incluant... 1) l'initiative d'ECCC visant à améliorer la présentation des alertes sous forme d'alertes météorologiques codées par couleur est provisoirement prévue pour un déploiement le 26 novembre 2025. Des changements aux données apparaîtront dans le PAC suite à ce déploiement, 2) le nom de l’alerte ‘avertissement de froid extrême’ changera pour ‘avertissement de froid’, 3) deux noms de zones publiques seront modifiés en Saskatchewan, 4) l’initiative d’ECCC visant à introduire des polygones libres pour représenter la véritable zone de menace d’un danger météorologique se poursuit. Des changements seront également apportés au PAC et 5) d’autres améliorations et corrections mineures. Pour plus d’informations sur ces changements: https://comm.collab.science.gc.ca/mailman3/hyperkitty/list/dd_info@comm.collab.science.gc.ca/

Effective: Wed December 3, 2025, 3:23 AM
Expires: Wed December 3, 2025, 1:01 PM

Snow continues this morning. Locations: parts of southern New Brunswick. Total snowfall: 10 to 15 cm, possibly more over parts of southeastern New Brunswick, including the Moncton area. Time span: ending this morning. Remarks: The highest snowfall amounts will likely occur over southeastern New Brunswick, especially over higher terrain. Accumulations of snow and ice may create slippery and hazardous travel conditions. ### Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to NBstorm@ec.gc.ca or post reports on X using #NBStorm. For more information about the alerting program, please visit: https://www.canada.ca/en/services/environment/weather/severeweather/weather-alerts/colour-coded-alerts.


Wednesday, December 3, 2025

Weather Forecast

Conditions: Moderate or heavy snow showers
Average Temperature: 28.7°F
Average Humidity: 82%
Chance of Rain: 61%
Wind: 12.8 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 1.68 μg/m3
PM10: 1.82 μg/m3
Carbon Monoxide: 158.36 μg/m3
Nitrogen Dioxide: 3.19 μg/m3
Sulphur Dioxide: 1.6 μg/m3
Ozone: 77.8 μg/m3

Astronomical

Sunrise: 6:51 AM
Sun Transit: 11:19 AM
Sunset: 3:48 PM
Daylight: 8 hrs 57 mins
Moonrise: 2:21 PM
Moon Transit: 10:24 PM
Moonset: 5:17 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 98.1%

Best Times for Fishing or Hunting

Major Periods

12:32 AM - 3:02 PM
12:00 AM - 12:00 AM

Minor Periods

1:51 PM - 3:21 PM
4:47 AM - 6:17 AM

Action Rating: 3 out of 5

Thursday, December 4, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 30.7°F
Average Humidity: 72%
Chance of Rain: 0%
Wind: 18.6 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 3.16 μg/m3
PM10: 3.41 μg/m3
Carbon Monoxide: 170.56 μg/m3
Nitrogen Dioxide: 4.91 μg/m3
Sulphur Dioxide: 1.98 μg/m3
Ozone: 75.64 μg/m3

Astronomical

Sunrise: 6:52 AM
Sun Transit: 11:19 AM
Sunset: 3:47 PM
Daylight: 8 hrs 56 mins
Moonrise: 3:06 PM
Moon Transit: 11:30 PM
Moonset: 6:44 AM
Moon Phase: Full
Moon Illumination: 99.9%

Best Times for Fishing or Hunting

Major Periods

1:37 PM - 4:07 PM
12:00 AM - 12:00 AM

Minor Periods

2:36 PM - 4:06 PM
6:14 AM - 7:44 AM

Action Rating: 5 out of 5

Friday, December 5, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 16.3°F
Average Humidity: 44%
Chance of Rain: 0%
Wind: 13.2 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 2.16 μg/m3
PM10: 2.76 μg/m3
Carbon Monoxide: 150.88 μg/m3
Nitrogen Dioxide: 1.93 μg/m3
Sulphur Dioxide: 1.29 μg/m3
Ozone: 77.28 μg/m3

Astronomical

Sunrise: 6:53 AM
Sun Transit: 11:19 AM
Sunset: 3:47 PM
Daylight: 8 hrs 55 mins
Moonrise: 4:06 PM
Moon Transit: 12:00 AM
Moonset: 8:03 AM
Moon Phase: Full
Moon Illumination: 99.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:44 PM - 5:14 PM

Minor Periods

3:36 PM - 5:06 PM
7:33 AM - 9:03 AM

Action Rating: 4 out of 5

Saturday, December 6, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 20.5°F
Average Humidity: 76%
Chance of Rain: 0%
Wind: 4.5 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 5.15 μg/m3
PM10: 6.68 μg/m3
Carbon Monoxide: 164.12 μg/m3
Nitrogen Dioxide: 5.44 μg/m3
Sulphur Dioxide: 2.26 μg/m3
Ozone: 70.12 μg/m3

Astronomical

Sunrise: 6:54 AM
Sun Transit: 11:20 AM
Sunset: 3:47 PM
Daylight: 8 hrs 53 mins
Moonrise: 5:19 PM
Moon Transit: 12:38 AM
Moonset: 9:08 AM
Moon Phase: Full
Moon Illumination: 96.0%

Best Times for Fishing or Hunting

Major Periods

12:08 AM - 2:38 AM
3:51 PM - 6:21 PM

Minor Periods

4:49 PM - 6:19 PM
8:38 AM - 10:08 AM

Action Rating: 4 out of 5

Sunday, December 7, 2025

Weather Forecast

Conditions: Mist
Average Temperature: 23.5°F
Average Humidity: 84%
Chance of Rain: 0%
Wind: 10.3 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 5.26 μg/m3
PM10: 6.52 μg/m3
Carbon Monoxide: 182.81 μg/m3
Nitrogen Dioxide: 5.91 μg/m3
Sulphur Dioxide: 2.29 μg/m3
Ozone: 61.46 μg/m3

Astronomical

Sunrise: 6:55 AM
Sun Transit: 11:20 AM
Sunset: 3:47 PM
Daylight: 8 hrs 52 mins
Moonrise: 6:40 PM
Moon Transit: 1:43 AM
Moonset: 9:57 AM
Moon Phase: Waning Gibbous
Moon Illumination: 90.5%

Best Times for Fishing or Hunting

Major Periods

1:13 AM - 3:43 AM
4:53 PM - 7:23 PM

Minor Periods

6:10 PM - 7:40 PM
9:27 AM - 10:57 AM

Action Rating: 2 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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