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

Current Water Temperature

32.5°F

Measurement Time: Friday, December 19, 2025, 6:45 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

56.1°F
Patchy rain nearby
Conditions: Patchy rain nearby
Humidity: 91%
Feels Like: 51.5°F
Wind: S 21 mph
Wind Gusts: 32.4 mph
Pressure: 29.76 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 5 mi
UV Index: 0.1

Five Day Weather Forecast

Heavy rain
Fri
H: 54°F
L: 34°F
Moderate or heavy snow showers
Sat
H: 31°F
L: 22°F
Moderate or heavy snow showers
Sun
H: 39°F
L: 25°F
Partly Cloudy
Mon
H: 25°F
L: 18°F
Light freezing rain
Tue
H: 32°F
L: 17°F

Air Quality

AQI: 1 - Good
PM2.5: 6.14 μg/m3
PM10: 9.24 μg/m3
Carbon Monoxide: 123.84 μg/m3
Nitrogen Dioxide: 1.34 μg/m3
Sulphur Dioxide: 1.04 μg/m3
Ozone: 87 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 11:26 AM
Sunset: 3:49 PM
Daylight: 8 hrs 45 mins
Moonrise: 7:09 AM
Moon Transit: 11:06 AM
Moonset: 3:03 PM
Moon Phase: New
Moon Illumination: 1.1%

Best Times for Fishing or Hunting

Major Periods

1:18 AM - 3:48 AM
10:36 AM - 1:06 PM

Minor Periods

2:33 PM - 4:03 PM
6:39 AM - 8:09 AM

Action Rating: 5 out of 5

yellow warning - wind - 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: Thu December 18, 2025, 9:02 PM
Expires: Fri December 19, 2025, 1:02 PM

Unseasonably warm temperature and strong winds are expected. Locations: southern and south-central New Brunswick. Wind gusts: southerly 70 to 90 km/h, except gusts to 110 km/h along the Fundy coast. Time span: late Friday afternoon until early Saturday morning. Remarks: strong southerly winds will switch to the west Saturday morning and pick up in intensity during the day. Strong winds may cause tree branches to break and damage utility lines. Check transit, ferry, or flight statuses well in advance, as delays or disruptions could occur. Ensure gutters and storm drains are clear of snow, ice, and other debris. Secure loose outdoor items that could be blown around by strong winds. ### Wind warnings are issued when there is a significant risk of damaging winds. 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.


yellow warning - rainfall - 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: Thu December 18, 2025, 9:04 PM
Expires: Fri December 19, 2025, 1:04 PM

Significant rainfall combined with melting snow is expected. Locations: southern New Brunswick. Total rainfall: 25 to 40 mm. Time span: Friday afternoon until early Saturday morning. Remarks: Rain and mild temperatures will lead to melting snow and minor runoff. Ensure storm drains and gutters are clear of ice and debris to reduce localized flooding. ### Visibility will likely be suddenly reduced at times. Rainfall warnings are issued when significant impacts are expected due to rainfall amounts. 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.


Friday, December 19, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 45.2°F
Average Humidity: 87%
Chance of Rain: 84%
Wind: 28.2 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 9.53 μg/m3
PM10: 14.52 μg/m3
Carbon Monoxide: 149.84 μg/m3
Nitrogen Dioxide: 1.72 μg/m3
Sulphur Dioxide: 1.31 μg/m3
Ozone: 79.4 μg/m3

Astronomical

Sunrise: 7:04 AM
Sun Transit: 11:26 AM
Sunset: 3:49 PM
Daylight: 8 hrs 45 mins
Moonrise: 7:09 AM
Moon Transit: 11:06 AM
Moonset: 3:03 PM
Moon Phase: New
Moon Illumination: 1.1%

Best Times for Fishing or Hunting

Major Periods

1:18 AM - 3:48 AM
10:36 AM - 1:06 PM

Minor Periods

2:33 PM - 4:03 PM
6:39 AM - 8:09 AM

Action Rating: 5 out of 5

Saturday, December 20, 2025

Weather Forecast

Conditions: Moderate or heavy snow showers
Average Temperature: 29.2°F
Average Humidity: 60%
Chance of Rain: 71%
Wind: 18.6 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 1.73 μg/m3
PM10: 2.04 μg/m3
Carbon Monoxide: 149.12 μg/m3
Nitrogen Dioxide: 1.96 μg/m3
Sulphur Dioxide: 1.52 μg/m3
Ozone: 77.32 μg/m3

Astronomical

Sunrise: 7:05 AM
Sun Transit: 11:27 AM
Sunset: 3:49 PM
Daylight: 8 hrs 45 mins
Moonrise: 8:01 AM
Moon Transit: 11:58 AM
Moonset: 3:59 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

2:10 AM - 4:40 AM
11:28 AM - 1:58 PM

Minor Periods

3:29 PM - 4:59 PM
7:31 AM - 9:01 AM

Action Rating: 5 out of 5

Sunday, December 21, 2025

Weather Forecast

Conditions: Moderate or heavy snow showers
Average Temperature: 33.6°F
Average Humidity: 78%
Chance of Rain: 88%
Wind: 15.7 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 5.98 μg/m3
PM10: 7.64 μg/m3
Carbon Monoxide: 164.2 μg/m3
Nitrogen Dioxide: 5.23 μg/m3
Sulphur Dioxide: 3.06 μg/m3
Ozone: 67 μg/m3

Astronomical

Sunrise: 7:05 AM
Sun Transit: 11:27 AM
Sunset: 3:50 PM
Daylight: 8 hrs 45 mins
Moonrise: 8:44 AM
Moon Transit: 12:50 AM
Moonset: 5:03 PM
Moon Phase: New
Moon Illumination: 1.5%

Best Times for Fishing or Hunting

Major Periods

3:02 AM - 5:32 AM
12:20 AM - 2:50 PM

Minor Periods

4:33 PM - 6:03 PM
8:14 AM - 9:44 AM

Action Rating: 3 out of 5

Monday, December 22, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 23.1°F
Average Humidity: 58%
Chance of Rain: 0%
Wind: 16.3 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 1.46 μg/m3
PM10: 1.57 μg/m3
Carbon Monoxide: 150.96 μg/m3
Nitrogen Dioxide: 1.98 μg/m3
Sulphur Dioxide: 1.39 μg/m3
Ozone: 73.8 μg/m3

Astronomical

Sunrise: 7:06 AM
Sun Transit: 11:27 AM
Sunset: 3:50 PM
Daylight: 8 hrs 45 mins
Moonrise: 9:17 AM
Moon Transit: 1:40 PM
Moonset: 6:11 PM
Moon Phase: Waxing Crescent
Moon Illumination: 5.5%

Best Times for Fishing or Hunting

Major Periods

3:53 AM - 6:23 AM
1:10 PM - 3:40 PM

Minor Periods

5:41 PM - 7:11 PM
8:47 AM - 10:17 AM

Action Rating: 3 out of 5

Tuesday, December 23, 2025

Weather Forecast

Conditions: Light freezing rain
Average Temperature: 21.8°F
Average Humidity: 67%
Chance of Rain: 79%
Wind: 9.8 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 2.15 μg/m3
PM10: 2.39 μg/m3
Carbon Monoxide: 155.83 μg/m3
Nitrogen Dioxide: 2.82 μg/m3
Sulphur Dioxide: 1.73 μg/m3
Ozone: 71.08 μg/m3

Astronomical

Sunrise: 7:06 AM
Sun Transit: 11:28 AM
Sunset: 3:51 PM
Daylight: 8 hrs 45 mins
Moonrise: 9:45 AM
Moon Transit: 2:28 PM
Moonset: 7:22 PM
Moon Phase: Waxing Crescent
Moon Illumination: 11.7%

Best Times for Fishing or Hunting

Major Periods

4:42 AM - 7:12 AM
1:58 PM - 4:28 PM

Minor Periods

6:52 PM - 8:22 PM
9:15 AM - 10:45 AM

Action Rating: 3 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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