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High-Rise Microclimate: Overwintering Palms in Arbon/Stachen Switzerland (Zone 8b)

Mazat
Mazat
in WEATHER / CLIMATE

Featured Replies

I wanted to share the current status of my 4th-floor balcony collection here in Arbon Stachen (Lake Constance). Despite the central European winter, my Washingtonia robusta, Phoenix canariensis, and Phoenix reclinata are thriving in their elevated microclimate.

Current Stats (06:55 AM, March 9):

Outdoor Temp (Arbon Stachen 425m, solar-ventilated Bresser)

 3.7 C / 97 % humidity

Balcony Temp 443m (4th floor, shaded Intertronic): 

 8.5 C / 61 %

Pressure: 1021 hPa (stable).

We are also successfully keeping a Howea forsteriana (Kentia) and Saribus rotundifolius on the balcony, protected by fleece and sagex.

The difference between the garden level and the 4th floor is the key to our success as a 'Light-Bringer' for these species.

IMG_20260309_065113.jpg

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Official Climate Update: Subtropical Microclimate (Cfa) | 36-year mean: 11.76°C (incl. -0.3K offset) | ~2,100+ annual sunshine hours Bresser solar-vent. Station @ 1.70m since 2019 (Stachen, CH)

    • Like 3
    • Author

    Current Stats (06:53 AM, March 10):

     

    Outdoor Temp (Arbon Stachen 425m, solar-ventilated Bresser)

     

     0.4 C / 32.72 F 95 % humidity

     

    Balcony Temp 443m (4th floor, shaded Intertronic): 

     

     6.9 C / 44.42 F / 55 %

     

    Pressure: 1018 hPa 

    IMG_20260310_065632.jpg

    IMG_20260310_065320.jpg

    Official Climate Update: Subtropical Microclimate (Cfa) | 36-year mean: 11.76°C (incl. -0.3K offset) | ~2,100+ annual sunshine hours Bresser solar-vent. Station @ 1.70m since 2019 (Stachen, CH)

    • Like 1
    • Author

    Current Stats (06:33 AM, March 16):

    Outdoor Temp (Arbon Stachen 425m, solar-ventilated Bresser)

     0.1 C / 32.18 F 95 % humidity

    Balcony Temp 443m (4th floor, shaded Intertronic): 

    6.6 C / 43.88 F / 78 %

    Pressure: 1017 hPa

    IMG_20260316_063439.jpg

    IMG_20260316_063251.jpg

    Official Climate Update: Subtropical Microclimate (Cfa) | 36-year mean: 11.76°C (incl. -0.3K offset) | ~2,100+ annual sunshine hours Bresser solar-vent. Station @ 1.70m since 2019 (Stachen, CH)

    • 2 weeks later...
    • Author

    Current Stats (06:33 AM, March 24):

    Outdoor Temp (Arbon Stachen 425m, solar-ventilated Bresser)

     0.3 C / 32.54 F 92 % humidity

    Balcony Temp 443m (4th floor, shaded Intertronic): 

    6.2 C / 43.16 F / 53 %

    Pressure: 1021 hPa

    IMG_20260324_063234.jpg

    IMG_20260324_063304.jpg

    Official Climate Update: Subtropical Microclimate (Cfa) | 36-year mean: 11.76°C (incl. -0.3K offset) | ~2,100+ annual sunshine hours Bresser solar-vent. Station @ 1.70m since 2019 (Stachen, CH)

    • 2 weeks later...
    • Author

    Current Stats (06:45 AM, April 7):

    Lowest temperature this morning

    Outdoor Temp (Arbon Stachen 425m, solar-ventilated Bresser)  

     4.4 C / 39.92 F 94 % humidity

    Balcony Temp 443m (4th floor, shaded Intertronic): All passive protection has been removed since Saturday, April 4, 2026 

    10.1 C  / 50.18 F / 55 %

    Pressure: 1021 hPa

     

    IMG_20260407_064939.jpg

    IMG_20260407_065229.jpg

    IMG_20260407_065238.jpg

    IMG_20260407_071005.jpg

    Official Climate Update: Subtropical Microclimate (Cfa) | 36-year mean: 11.76°C (incl. -0.3K offset) | ~2,100+ annual sunshine hours Bresser solar-vent. Station @ 1.70m since 2019 (Stachen, CH)

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