from django.template.loader import get_template
from django.shortcuts import render_to_response
from django.http import HttpResponse
from myproject.pogoda.models import Parametr, DTValue, Znachenie
import datetime

def poslednee_temperatyra(request):
    posl_temp = Znachenie.objects.filter(sensor__measuring="Temperatyra").latest('dt_value')
    return render_to_response('poslednee_temperatyra.html', {'posl_temp':posl_temp})

def all_temperatyra(request):
    temper = Znachenie.objects.filter(sensor__measuring="Temperatyra")
    summa=0
    ii=0
    for i in temper:
        t=str(i)
        tt=float(t)
        ii=ii+1
        summa=summa+tt
    sred_temp=summa/ii
    return render_to_response('all_temperatyra.html', {'temper':temper, 'sred_temp':round(sred_temp)})

def all_izmereniya(request):
    return render_to_response('all_izmereniya.html')

Все измерения
<br>
{% include 'poslednee_temperatyra.html' %}
<br>
{% include 'all_temperatyra.html' %}

Последнее значение температуры
{{ posl_temp }} °C

Средняя температура {{sred_temp}} °C
{% for temperature in temper %}
<table><tbody><tr><td>{{ temperature }} °C</td></tr></tbody></table>
{% endfor %}