Checks if the temperatures will be freezing in your area over the next 24hrs and texts you if there are freezing temps. I have mine set to run at 7:00am on a cron job.

check_freezing_temps.py

#########SETUP#########
#textbelt_key: you get one free text per day with the key 'textbelt' or if you think you need more get an api key from https://textbelt.com/
#phone_numbers: a single phone number as a list, just the digits, or if you want to send to multiple people, add addtional numbers in the list
#lat_lon: your latitude and longitude in the format "xxx.xxxx,-xxx.xxxx". https://mapper.acme.com/ is helpful here, though note to change the formatting (ie "N 45.52300 W 122.67600" to "45.52300,-122.67600")
#freezing_notification_temp: default is that you will be notified for temperatures at or below 35, but change that if you want


textbelt_key = "textbelt"
phone_numbers = ["5555555555","5555554444"]
lat_lon = "45.52300,-122.67600"

freezing_notification_temp = 35 #temperature or lower in fahrenheit that we'll send a notification for

import urllib.request
import json
from datetime import datetime
import requests

def pretty_timestamp_short(timestamp):
    dt = datetime.strptime(timestamp, "%Y-%m-%dT%H:%M:%S%z")
    return dt.strftime("%-I%p")
def send_text(phone,message,api_key):
    requests.post('https://textbelt.com/text', {'phone': phone,'message': message,'key': api_key,})

#the weather.gov api is only accepts lat/lon with four decimals, so we'll round it
lat, lon = lat_lon.split(',')
lat_lon = f"{round(float(lat), 4)},{round(float(lon), 4)}"

with urllib.request.urlopen(f"https://api.weather.gov/points/{lat_lon}") as url: #get the forecast url for our location
    data = json.load(url)

hourly_forecast = data['properties']['forecastHourly'] 
location_name = f"{data['properties']['relativeLocation']['properties']['city']}, {data['properties']['relativeLocation']['properties']['state']}"

with urllib.request.urlopen(hourly_forecast) as url: #get the forecast data
    data = json.load(url)

message = f"{location_name} temperature predicted to be at or below {freezing_notification_temp}F over the next 24 hours:\n"
freezing_temps_found = False
for period in data['properties']['periods']: #loop through the forecast data
    if period['temperature']<=freezing_notification_temp: #if the temperature is close to freezing we'll text
        message += f"{period['temperature']}F at {pretty_timestamp_short(period['startTime'])}, "
        freezing_temps_found = True
    if period['number']>24: #break after looking at 24hrs of data
        break

if freezing_temps_found:
    message = f"{message.rstrip(', ')}." #remove trailing comma
    print(message)
    
    for phone_number in phone_numbers:
        send_text(phone_number,message,textbelt_key)
else:
    print(f"No temperatures at or below {freezing_notification_temp}F over the next 24 hours.")